（2016.3.31までの分）
c C
rb Ruby
py Python
RC Rosetta Codeにもコードあり
Heroku
08.150308.001.Clock sequence / rb
06.160331.004.12 = 3 * 4(12)
06.160331.003.12 = 3 * 4(11) / rb
06.160331.002.12 = 3 * 4(10) / rb
06.160331.001.12 = 3 * 4(9) / rb
06.160330.001.12 = 3 * 4(8)
06.160329.002.12 = 3 * 4(7) / rb
06.160329.001.12 = 3 * 4(6) / rb
06.160328.004.12 = 3 * 4(5) / rb
06.160328.003.12 = 3 * 4(4) / rb
06.160328.002.12 = 3 * 4(3) / rb
06.160328.001.12 = 3 * 4(2) / rb
06.160327.003.12 = 3 * 4(1) / rb
06.160327.002.逆数の和が1 であるような互いに異なる奇数の集合(2) / rb
06.160327.001.逆数の和が1 であるような互いに異なる奇数の集合(1) / rb
06.160326.002.Wieferich prime / rb
06.160326.001.OEIS での検索
06.160322.002.Zebra Irrationals / rb
06.160322.001.Double Mersenne number / rb
06.160321.002.素数さいころ(5) / rb
06.160321.001.いろいろな並び替え / rb
06.160320.006.π を分数で近似(3) / rb
06.160320.005.π を分数で近似(2) / rb
06.160320.004.π を分数で近似(1) / rb
06.160320.003.Flint Hills Series(2)
06.160320.002.Flint Hills Series(1) / rb
06.160320.001.素数さいころ(4) / rb
06.160319.003.素数さいころ(3) / rb
06.160319.002.素数さいころ(2) / rb
06.160319.001.素数さいころ(1) / rb
06.160318.001.Unexpected biases in the distribution of consecutive primes(2) / rb
06.160317.001.Unexpected biases in the distribution of consecutive primes(1) / rb
06.160313.001.ディオファンタスm-項(2) / rb
06.160312.003.ディオファンタスm-項(1) / rb
06.160312.002.Derangement(2) / rb
06.160312.001.Derangement(1) / rb
06.160310.002.Machin-like formula(2) / rb
06.160310.001.Machin-like formula(1) / rb
06.160307.001.10^(2 i) + 10^i + 1 の素因数分解 / rb
06.160306.005.a × b = 10^i + 1 / rb
06.160306.004.Numbers n such that n concatenated with itself is a biperiod square(2) / rb
06.160306.003.Numbers n such that n concatenated with itself is a biperiod square(1) / rb
06.160306.002.Ordered Bell number(4) / rb
06.160306.001.Ordered Bell number(3) / rb
06.160305.003.Ordered Bell number(2) / rb
06.160305.002.Ordered Bell number(1) / rb
06.160305.001.Number of unitary divisors of n / rb
06.160304.001.Ramanujan prime(3) / rb
06.160302.003.Ramanujan prime(2) / rb
06.160302.002.Ramanujan prime(1) / rb
06.160302.001.素数の個数(7) / rb
06.160228.003.Borwein integral / rb
06.160228.002.Ei(1) - γ / rb
06.160228.001.φ(n) / (x^n - 1) の和(2)
06.160227.003.φ(n) / (x^n - 1) の和(1) / rb
06.160227.002.隣り合う階乗の和(5) / rb
06.160227.001.隣り合う階乗の和(4)
06.160225.003.隣り合う階乗の和(3) / rb
06.160225.002.隣り合う階乗の和(2) / rb
06.160225.001.隣り合う階乗の和(1) / rb
06.160223.002.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(5)
06.160223.001.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(4) / rb
06.160221.004.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(3) / rb
06.160221.003.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(2) / rb
06.160221.002.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(1) / rb
06.160221.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(5) / rb
06.160220.003.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(4) / rb
06.160220.002.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(3) / rb
06.160220.001.素数の個数(6) / rb
06.160218.001.パスカルの三角形におけるp^4 を法とする合同(4) / rb
06.160217.003.パスカルの三角形におけるp^4 を法とする合同(3)
06.160217.002.パスカルの三角形におけるp^4 を法とする合同(2) / rb
06.160217.001.Primes consisting of a digit and a string of 9's / rb
06.160215.001.パスカルの三角形におけるp^4 を法とする合同(1) / rb
06.160214.002.A generalization of Wolstenholme’s Theorem / rb
06.160214.001.調和数の分子と分母 / rb
06.160210.001.Hop-over Puzzle(6) / rb
06.160209.001.Hop-over Puzzle(5) / rb
06.160208.004.Hop-over Puzzle(4) / rb
06.160208.003.Hop-over Puzzle(3) / rb
06.160208.002.Hop-over Puzzle(2) / rb
06.160208.001.Hop-over Puzzle(1) / rb
06.160207.001.アプリの削除 / Heroku
06.160206.002.原始的アイゼンシュタイン三角形と原始的タレース三角形(2) / rb
06.160206.001.原始的アイゼンシュタイン三角形と原始的タレース三角形(1) / rb
06.160130.001.引き算魔方陣 / rb
06.160128.001.誤っているようで誤っていない数式 / rb
06.160126.001.「和の２乗 = ３乗の和」となる組合せ(4) / rb
06.160124.001.「和の２乗 = ３乗の和」となる組合せ(3) / rb
06.160123.002.「和の２乗 = ３乗の和」となる組合せ(2)
06.160123.001.「和の２乗 = ３乗の和」となる組合せ(1) / rb
06.160117.002.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(3) / rb
06.160117.001.Lander, Parkin, and Selfridge conjecture / rb
06.160114.001.√5 の近似値の連分数展開(2) / rb
06.160113.001.√5 の近似値の連分数展開(1) / rb
06.160112.002.n と互いに素なn 未満の自然数の和 / rb
06.160112.001.単位分数の和が1 / 2(3) / rb
06.160111.003.単位分数の和が1 / 2(2) / rb
06.160111.002.単位分数の和が1 / 2(1) / rb
06.160111.001.逆数をとり、単位分数を加えていく数列 / rb
06.160109.006.9 × (10^(18n) - 1) / 19 の性質について(5) / rb
06.160109.005.9 × (10^(18n) - 1) / 19 の性質について(4) / rb
06.160109.004.9 × (10^(18n) - 1) / 19 の性質について(3) / rb
06.160109.003.9 × (10^(18n) - 1) / 19 の性質について(2) / rb
06.160109.002.9 × (10^(18n) - 1) / 19 の性質について(1) / rb
06.160109.001.19 / 89 … 91 の性質について / rb
06.160108.002.1 / n の性質について(3) / rb
06.160108.001.1 / n の性質について(2) / rb
06.160106.003.異なる単位分数（< 1）の和が1 より大きい自然数(2) / rb
06.160106.002.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(2) / rb
06.160106.001.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(1) / rb
06.160105.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(3) / rb
06.160104.002.Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,....,n,n,n} with no two consecutive terms equal / rb
06.160104.001.異なる単位分数（< 1）の和が1 より大きい自然数(1) / rb
06.160103.006.Arrangement of the word 'Success' / rb
06.160103.005.注意書き / rb
06.160103.004.A190945(100)(4) / rb
06.160103.003.A190945(100)(3) / rb
06.160103.002.A190945(100)(2) / rb
06.160103.001.A190945(100)(1)
06.160101.002.p(pn | 和因子は素数)(3) / rb
06.160101.001.Riffle Shuffle / rb
06.151231.007.Numbers that are not the sum of distinct pentagonal numbers / rb
06.151231.006.Numbers that are not the sum of distinct squares / rb
06.151231.005.Numbers that are not the sum of distinct triangular numbers / rb
06.151231.004.12桁の数字
06.151231.003.p(n^4 | 和因子は四乗数) / rb
06.151231.002.p(n^3 | 和因子は立方数) / rb
06.151231.001.p(n^2 | 和因子は平方数) / rb
06.151230.004.p(pn | 和因子は素数)(2) / rb
06.151230.003.p(pn | 和因子は素数)(1) / rb
06.151230.002.p(Fn | 和因子はフィボナッチ数)(2) / rb
06.151230.001.p(Fn | 和因子はフィボナッチ数)(1) / rb
06.151228.002.p(n | 和因子はフィボナッチ数)(2) / rb
06.151228.001.p(n | 和因子はフィボナッチ数)(1) / rb
06.151227.009.Stern's diatomic series に現れるフィボナッチ数(2) / rb
06.151227.008.Stern's diatomic series に現れるフィボナッチ数(1) / rb
06.151227.007.Stern's diatomic series(4) / rb
06.151227.006.Stern's diatomic series(3) / rb
06.151227.005.Stern's diatomic series(2) / rb
06.151227.004.Stern's diatomic series(1) / rb
06.151227.003.Calkin–Wilf sequence / rb
06.151227.002.離散力学系における軌道の計算(2) / rb
06.151227.001.離散力学系における軌道の計算(1) / rb
06.151226.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(2) / rb
06.151224.002.Topswops(3) / rb
06.151224.001.Topswops(2) / rb
06.151223.004.Topswops(1) / rb
06.151223.003.郵便切手の問題(3) / rb
06.151223.002.郵便切手の問題(2) / rb
06.151223.001.n! を2^(n - k) で割ると整数か？ / rb
06.151220.003.郵便切手の問題(1) / rb
06.151220.002.連続する整数をkずらすこと
06.151220.001.Josephus problem / rb
06.151219.007.Frobenius number for k consecutive numbers(2) / rb
06.151219.006.Frobenius number for k consecutive numbers(1) / rb
06.151219.005.Frobeniusの硬貨交換問題(5) / rb
06.151219.004.Frobeniusの硬貨交換問題(4) / rb
06.151219.003.Frobeniusの硬貨交換問題(3) / rb
06.151219.002.Frobeniusの硬貨交換問題(2) / rb
06.151219.001.Frobeniusの硬貨交換問題(1) / rb
06.151217.001.周期性をもつ差分方程式 / rb
06.151214.002.Euler brick(2) / rb
06.151214.001.Euler brick(1) / rb
06.151213.004.原始ピタゴラス数の和(2) / rb
06.151213.003.原始ピタゴラス数の和(1) / rb
06.151213.002.Odd primes p such that Pi_{3,1}(p) = Pi_{3,2}(p) - 1 / rb
06.151213.001.Pythagorean prime / rb
06.151212.005.Hilbert prime(3) / rb
06.151212.004.Hilbert prime(2) / rb
06.151212.003.Hilbert prime(1) / rb
06.151212.002.Chebyshev's bias(2) / rb
06.151212.001.Chebyshev's bias(1) / rb
06.151211.001.mapしてflattenすることと flat_map との違い / rb
06.151210.003.Number of partitions of n that do not contain 1 as a part(2) / rb
06.151210.002.Number of partitions of n that do not contain 1 as a part(1) / rb
06.151210.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(2) / rb
06.151209.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(1) / rb
06.151208.001.分割の逆数和が1 / rb
06.151206.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(1) / rb
06.151202.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(2) / rb
06.151129.004.break と exit の違い / rb
06.151129.003.puts と ハッシュ / rb
06.151129.002.正方形の形をした領域内のSelf-avoiding walk(3) / rb
06.151129.001.二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151128.004.正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.003.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.002.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151128.001.正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151127.001.二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151125.002.二等辺三角形の形をした領域内のSelf-avoiding walk(2) / rb
06.151125.001.二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151124.001.Dyck path とSelf-avoiding walk の融合(7) / rb
06.151123.006.Dyck path とSelf-avoiding walk の融合(6) / c
06.151123.005.Dyck path とSelf-avoiding walk の融合(5) / c
06.151123.004.Dyck path とSelf-avoiding walk の融合(4) / rb
06.151123.003.Dyck path とSelf-avoiding walk の融合(3) / rb
06.151123.002.Dyck path とSelf-avoiding walk の融合(2) / rb
06.151123.001.Dyck path とSelf-avoiding walk の融合(1) / rb
06.151122.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151122.002.直角二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151122.001.直角二等辺三角形の形をした領域内のSelf-avoiding walk(2) / c
06.151121.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151121.002.Self-avoiding walk(6) / rb
06.151121.001.Self-avoiding walk(5) / c
06.151118.002.Self-avoiding walk(4) / c
06.151118.001.Self-avoiding walk(3) / c
06.151117.002.Self-avoiding walk(2) / c
06.151117.001.Self-avoiding walk(1) / c
06.151116.001.Number of weakly unimodal partitions of n(2) / rb
06.151115.002.Number of weakly unimodal partitions of n(1) / rb
06.151115.001.Dixon's identity / rb
06.151114.002.Number of directed Hamiltonian paths in mxn grid graph(2) / c
06.151114.001.Number of directed Hamiltonian paths in mxn grid graph(1) / c
06.151113.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(1) / rb
06.151109.004.Number of partitions of n into fourth powers / rb
06.151109.003.Number of partitions of n into cubes / rb
06.151109.002.Number of partitions of n into squares / rb
06.151109.001.Number of palindromic and unimodal compositions of n / rb
06.151108.005.Polite number(5) / rb
06.151108.004.Polite number(4) / rb
06.151108.003.Polite number(3)
06.151108.002.Polite number(2) / rb
06.151108.001.約数の出力 / rb
06.151107.003.Polite number(1) / rb
06.151107.002.(-1)^k (n / k) の和 / rb
06.151107.001.n / k の和 / rb
06.151104.001.Kolakoski sequence(2) / rb
06.151103.002.Kolakoski sequence(1) / rb
06.151103.001.Gauss circle problem(4) / rb
06.151102.001.Gauss circle problem(3) / rb
06.151101.001.Gauss circle problem(2) / rb
06.151031.001.Alternating permutation / rb
06.151025.001.線対称に分割 / rb
06.151024.002.Number of times k is used in writing out all the numbers 0 through n(3)
06.151024.001.Number of times k is used in writing out all the numbers 0 through n(2) / rb
06.151023.001.Number of times k is used in writing out all the numbers 0 through n(1) / rb
06.151022.002.Number of times k is used in writing out all the numbers 1 through n(12)
06.151022.001.Number of times k is used in writing out all the numbers 1 through n(11) / rb
06.151021.001.Number of times k is used in writing out all the numbers 1 through n(10)
06.151020.001.Number of times k is used in writing out all the numbers 1 through n(9) / rb
06.151018.002.Number of times k is used in writing out all the numbers 1 through n(8) / rb
06.151018.001.Number of times k is used in writing out all the numbers 1 through n(7) / rb
06.151013.002.Number of times k is used in writing out all the numbers 1 through n(6) / rb
06.151013.001.Number of times k is used in writing out all the numbers 1 through n(5) / rb
06.151012.007.Number of times k is used in writing out all the numbers 1 through n(4) / rb
06.151012.006.Number of times k is used in writing out all the numbers 1 through n(3) / rb
06.151012.005.Number of times k is used in writing out all the numbers 1 through n(2) / rb
06.151012.004.Number of times k is used in writing out all the numbers 1 through n(1) / rb
06.151012.003.Number of times 1 is used in writing out all the numbers 1 through n(7) / rb
06.151012.002.Number of times 1 is used in writing out all the numbers 1 through n(6) / rb
06.151012.001.Number of times 1 is used in writing out all the numbers 1 through n(5) / rb
06.151011.005.Number of times 1 is used in writing out all the numbers 1 through n(4) / rb
06.151011.004.Number of times 1 is used in writing out all the numbers 1 through n(3) / rb
06.151011.003.Number of times 1 is used in writing out all the numbers 1 through n(2) / rb
06.151011.002.Number of times 1 is used in writing out all the numbers 1 through n(1) / rb
06.151011.001.整数零点 / rb
06.151004.004.素数が無数に存在すること(2) / rb
06.151004.003.素数が無数に存在すること(1) / rb
06.151004.002.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(2) / rb
06.151004.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(1) / rb
06.150929.001.オイラー関数のベキ(3) / rb
06.150927.002.オイラー関数のベキ(2) / rb
06.150927.001.k角数定理？ / rb
06.150924.001.オイラー関数のベキ(1) / rb
06.150922.002.フリーマン・ダイソンによるτ関数に関する公式 / rb
06.150922.001.Ulam spiral / rb
06.150921.003.階段状に現れるフィボナッチ数列 / rb
06.150921.002.縦読み、横読みの一般化 / rb
06.150921.001.Half-Catalan number / rb
06.150920.001.分割が絡んだ係数について / rb
06.150919.001.二重根号が外れてきれいになる式 / rb
06.150915.001.ラマヌジャンが見つけた等式 / rb
06.150914.002.xx + 27yy 型の素数 / rb
06.150914.001.Number of knight's tours on a m×n chessboard(3) / c
06.150913.001.Number of knight's tours on a m×n chessboard(2) / c
06.150912.001.Number of knight's tours on a m×n chessboard(1) / c
06.150910.002.コード用
06.150910.001.Number of knight's tours on a 3×k chessboard(2) / rb
06.150908.001.Number of knight's tours on a 3×k chessboard(1) / c
06.150904.001.桂馬飛び / rb
06.150903.001.p^n + s^n = q^n + r^n / rb
06.150902.001.p^5 + s^5 = q^5 + r^5 / rb
06.150830.003.p^4 + s^4 = q^4 + r^4 / rb
06.150830.002.アフィン暗号(2) / rb
06.150830.001.アフィン暗号(1) / rb
06.150829.001.ラマヌジャン予想(6)
06.150828.001.どの２つの和も平方数(4) / rb
06.150827.001.どの２つの和も平方数(3) / rb
06.150824.006.どの２つの和も立方数(16) / rb
06.150824.005.どの２つの和も立方数(15) / rb
06.150824.004.どの２つの和も立方数(14) / rb
06.150824.003.どの２つの和も立方数(13) / rb
06.150824.002.どの２つの和も立方数(12) / rb
06.150824.001.どの２つの和も立方数(11) / rb
06.150823.007.どの２つの和も立方数(10) / rb
06.150823.006.どの２つの和も立方数(9) / rb
06.150823.005.どの２つの和も立方数(8) / rb
06.150823.004.どの２つの和も立方数(7) / rb
06.150823.003.どの２つの和も立方数(6) / rb
06.150823.002.どの２つの和も立方数(5) / rb
06.150823.001.どの２つの和も立方数(4) / rb
06.150822.004.どの２つの和も立方数(3) / rb
06.150822.003.累乗数 / rb
06.150822.002.どの２つの和も立方数(2) / rb
06.150822.001.どの２つの和も立方数(1) / rb
06.150821.001.どの２つの和も平方数(2) / rb
06.150820.001.どの２つの和も平方数(1) / rb
06.150816.002.円周率 / rb
06.150816.001.高次元カタラン数 / rb
06.150815.001.隣り合う素数の差と積 / rb
06.150806.002.Number of n-digit right-truncatable primes / rb
06.150806.001.Right-truncatable prime / rb
06.150805.001.タウ函数の合同関係 / rb
06.150804.001.Pisano period / rb
06.150803.002.Almost Integer / rb
06.150803.001.4p - 1 型のヘーグナー数の性質 / rb
06.150802.001.ラマヌジャン予想(5) / py
06.150801.003.Ramanujan's tau function(3) / py
06.150801.002.ラマヌジャン予想(4) / rb
06.150801.001.
06.150731.002.
06.150731.001.ラマヌジャン予想(3) / rb
06.150730.001.ラマヌジャン予想(2) / rb
06.150728.002.ラマヌジャン予想(1) / rb
06.150728.001.Ramanujan's tau function(2) / rb
06.150727.003.Ramanujan's tau function(1) / rb
06.150727.002.Reverse and Add(2) / rb
06.150727.001.Reverse and Add(1) / rb
06.150726.005.回文数式 / rb
06.150726.004.Bell number / rb
06.150726.003.1 / n の性質について(1) / rb
06.150726.002.Primes of the form identical odd digits followed by a 1 / rb
06.150726.001.Prime numbers of the form 33…331 / rb
06.150720.003.Collatz conjecture(2) / rb
06.150720.002.Collatz conjecture(1) / rb
06.150720.001.隣接素数の和で表す表し方の数 / rb
06.150719.002.Aliquot sequence(2) / rb
06.150719.001.Aliquot sequence(1) / rb
06.150709.002.素数の個数(5) / rb
06.150709.001.素数の個数(4) / rb
06.150708.001.素数の個数(3) / rb
06.150707.003.素数の個数(2) / rb
06.150707.002.素数の個数(1) / rb
06.150707.001.素数の和 / rb
06.150706.001.Carmichael number / rb
06.150625.001.ROT13 と ROT47 / rb
06.150624.002.素数を順番につなぎ合わせた数について(4) / rb
06.150624.001.素数を順番につなぎ合わせた数について(3) / rb
06.150621.004.素数を順番につなぎ合わせた数について(2) / rb
06.150621.003.素数を順番につなぎ合わせた数について(1) / rb
06.150621.002.2, 3, 5, 7 を使った素数 / rb
06.150621.001.2^i + 3^i + 5^i + 7^i 型の素数 / rb
06.150620.002.i (1以上9以下)を含むならば、i が i 個含む数の個数について(2) / rb
06.150620.001.i (1以上9以下)を含むならば、i が i 個含む数の個数について(1) / rb
06.150613.002.双子素数と隣り合う双子素数の和 / rb
06.150613.001.隣り合う素数の和 / rb
06.150607.003.Look-and-say sequence / rb / RC
06.150607.002.Mian-Chowla sequence / rb
06.150607.001.各桁の和と自身との和について / rb
06.150603.001.塊の個数 / rb
06.150531.002.Gauss circle problem(1) / rb
06.150531.001.Ulam number / rb
06.150529.001.Toothpick Sequence / rb
06.150527.001.φの和 / rb
06.150525.001.Conway-Guy sequence / rb
06.150524.001.「普通の分数の足し算」と「日付の足し算」が一致する組合せ / rb
06.150523.001.2〜Nまでをある規則にしたがって並びかえる / rb
06.150517.001.ｎ進グレイコード ↔ ｎ進表記 / rb
06.150503.003.| σ(i + 1) - σ(1) | ≠ 1 を満たすσの個数 / rb
06.150503.002.3 6 9 2 5 8 1 4 7 (2) / rb
06.150503.001.Ducci sequence / rb
06.150502.001.3 6 9 2 5 8 1 4 7 (1) / rb
06.150429.001.p(n | 和因子は相異なる) / rb
06.150425.002.p(n | 和因子は奇数) / rb
06.150425.001.Taxi-cab numbers: sums of 2 cubes in more than 1 way / rb
06.150422.001.カプレカ数 / rb
06.150419.001.864197532（高速化） / rb
06.150418.002.864197532 / rb
06.150418.001.Lucas、Perrin そして McIrvin（剰余について） / rb
06.150414.001.Lucas、Perrin そして McIrvin / rb
06.150413.002.Thue–Morse sequence / rb
06.150413.001.Schizophrenic number（連続する個数 2.0） / rb
06.150412.001.Schizophrenic number（連続する個数 1.0） / rb
06.150410.001.Schizophrenic number / rb
06.150405.003.Generalization of the Zeckendorf representation / rb
06.150405.002.Zeckendorf number representation / rb / RC
06.150405.001.Self-descriptive number / rb
06.150330.001.Heterosquare / rb
06.150329.004.Connell Sequence / rb
06.150329.003.21397 / rb
06.150329.002.Göbel's Sequence / rb
06.150329.001.Somos-k sequence / rb
06.150328.001.Perrin Pseudoprime / rb
06.150323.001.
06.150315.001.不思議数 / rb
06.150301.002.
06.150301.001.Silverman's Sequence / rb
06.150225.001.Square-free integer / rb
06.150224.002.Cyclic number / rb
06.150224.001.
06.150111.001.バイナリサーチ / rb
06.150110.004.リニアサーチ / rb
06.150110.003.マージソート / rb
06.150110.002.クイックソート / rb
06.150110.001.バブルソート / rb
06.150104.002.「n-クイーン」パズル / rb
06.150104.001.ナップザック問題 / rb
06.141027.001.Partition / py
06.140927.002.Lucky prime / rb
06.140927.001.Lucky number / rb
06.140831.001.Partition（高速化） / rb
06.140823.004.Prime Partition / rb
06.140823.003.Partition / rb
06.140823.002.
06.140823.001.
06.140813.001.最大増加部分列 / rb
06.140316.001.548834 / rb
06.140306.001.覆面算（SEND + MORE = MONEY） / rb
02.160309.001.sinc function の積の積分(2)
02.160308.001.sinc function の積の積分(1)
02.150822.001.連続する自然数の積は平方数ではない
02.130120.002.On the Inequality with Power-Exponential Function
02.130120.001.
09.160501.001.この記事
09.160307.001.
09.160131.001.
09.160101.001.
09.151129.001.
09.151108.001.
09.151031.001.
09.151012.001.
09.150927.001.
09.150913.001.
09.150829.001.
09.150827.001.
09.150822.001.
09.150815.001.
09.150801.001.
09.150727.001.
09.150720.001.
09.150706.001.
09.150607.001.
09.150531.001.
09.150529.001.
09.150525.001.
09.150503.001.
09.150418.001.
09.150412.001.
09.150405.001.
09.150330.001.
09.150329.001.
2016年3月7日月曜日
160307
c C
rb Ruby
py Python
RC Rosetta Codeにもコードあり
Heroku
08.150308.001.Clock sequence / rb
06.160306.005.a × b = 10^i + 1 / rb
06.160306.004.Numbers n such that n concatenated with itself is a biperiod square(2) / rb
06.160306.003.Numbers n such that n concatenated with itself is a biperiod square(1) / rb
06.160306.002.Ordered Bell number(4) / rb
06.160306.001.Ordered Bell number(3) / rb
06.160305.003.Ordered Bell number(2) / rb
06.160305.002.Ordered Bell number(1) / rb
06.160305.001.Number of unitary divisors of n / rb
06.160304.001.Ramanujan prime(3) / rb
06.160302.003.Ramanujan prime(2) / rb
06.160302.002.Ramanujan prime(1) / rb
06.160302.001.素数の個数(7) / rb
06.160228.003.Borwein integral / rb
06.160228.002.Ei(1) - γ / rb
06.160228.001.φ(n) / (x^n - 1) の和(2)
06.160227.003.φ(n) / (x^n - 1) の和(1) / rb
06.160227.002.隣り合う階乗の和(5) / rb
06.160227.001.隣り合う階乗の和(4)
06.160225.003.隣り合う階乗の和(3) / rb
06.160225.002.隣り合う階乗の和(2) / rb
06.160225.001.隣り合う階乗の和(1) / rb
06.160223.002.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(5)
06.160223.001.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(4) / rb
06.160221.004.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(3) / rb
06.160221.003.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(2) / rb
06.160221.002.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(1) / rb
06.160221.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(5) / rb
06.160220.003.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(4) / rb
06.160220.002.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(3) / rb
06.160220.001.素数の個数(6) / rb
06.160218.001.パスカルの三角形におけるp^4 を法とする合同(4) / rb
06.160217.003.パスカルの三角形におけるp^4 を法とする合同(3)
06.160217.002.パスカルの三角形におけるp^4 を法とする合同(2) / rb
06.160217.001.Primes consisting of a digit and a string of 9's / rb
06.160215.001.パスカルの三角形におけるp^4 を法とする合同(1) / rb
06.160214.002.A generalization of Wolstenholme’s Theorem / rb
06.160214.001.調和数の分子と分母 / rb
06.160210.001.Hop-over Puzzle(6) / rb
06.160209.001.Hop-over Puzzle(5) / rb
06.160208.004.Hop-over Puzzle(4) / rb
06.160208.003.Hop-over Puzzle(3) / rb
06.160208.002.Hop-over Puzzle(2) / rb
06.160208.001.Hop-over Puzzle(1) / rb
06.160207.001.アプリの削除 / Heroku
06.160206.002.原始的アイゼンシュタイン三角形と原始的タレース三角形(2) / rb
06.160206.001.原始的アイゼンシュタイン三角形と原始的タレース三角形(1) / rb
06.160130.001.引き算魔方陣 / rb
06.160128.001.誤っているようで誤っていない数式 / rb
06.160126.001.「和の２乗 = ３乗の和」となる組合せ(4) / rb
06.160124.001.「和の２乗 = ３乗の和」となる組合せ(3) / rb
06.160123.002.「和の２乗 = ３乗の和」となる組合せ(2)
06.160123.001.「和の２乗 = ３乗の和」となる組合せ(1) / rb
06.160117.002.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(3) / rb
06.160117.001.Lander, Parkin, and Selfridge conjecture / rb
06.160114.001.√5 の近似値の連分数展開(2) / rb
06.160113.001.√5 の近似値の連分数展開(1) / rb
06.160112.002.n と互いに素なn 未満の自然数の和 / rb
06.160112.001.単位分数の和が1 / 2(3) / rb
06.160111.003.単位分数の和が1 / 2(2) / rb
06.160111.002.単位分数の和が1 / 2(1) / rb
06.160111.001.逆数をとり、単位分数を加えていく数列 / rb
06.160109.006.9 × (10^(18n) - 1) / 19 の性質について(5) / rb
06.160109.005.9 × (10^(18n) - 1) / 19 の性質について(4) / rb
06.160109.004.9 × (10^(18n) - 1) / 19 の性質について(3) / rb
06.160109.003.9 × (10^(18n) - 1) / 19 の性質について(2) / rb
06.160109.002.9 × (10^(18n) - 1) / 19 の性質について(1) / rb
06.160109.001.19 / 89 … 91 の性質について / rb
06.160108.002.1 / n の性質について(3) / rb
06.160108.001.1 / n の性質について(2) / rb
06.160106.003.異なる単位分数（< 1）の和が1 より大きい自然数(2) / rb
06.160106.002.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(2) / rb
06.160106.001.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(1) / rb
06.160105.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(3) / rb
06.160104.002.Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,....,n,n,n} with no two consecutive terms equal / rb
06.160104.001.異なる単位分数（< 1）の和が1 より大きい自然数(1) / rb
06.160103.006.Arrangement of the word 'Success' / rb
06.160103.005.注意書き / rb
06.160103.004.A190945(100)(4) / rb
06.160103.003.A190945(100)(3) / rb
06.160103.002.A190945(100)(2) / rb
06.160103.001.A190945(100)(1)
06.160101.002.p(pn | 和因子は素数)(3) / rb
06.160101.001.Riffle Shuffle / rb
06.151231.007.Numbers that are not the sum of distinct pentagonal numbers / rb
06.151231.006.Numbers that are not the sum of distinct squares / rb
06.151231.005.Numbers that are not the sum of distinct triangular numbers / rb
06.151231.004.12桁の数字
06.151231.003.p(n^4 | 和因子は四乗数) / rb
06.151231.002.p(n^3 | 和因子は立方数) / rb
06.151231.001.p(n^2 | 和因子は平方数) / rb
06.151230.004.p(pn | 和因子は素数)(2) / rb
06.151230.003.p(pn | 和因子は素数)(1) / rb
06.151230.002.p(Fn | 和因子はフィボナッチ数)(2) / rb
06.151230.001.p(Fn | 和因子はフィボナッチ数)(1) / rb
06.151228.002.p(n | 和因子はフィボナッチ数)(2) / rb
06.151228.001.p(n | 和因子はフィボナッチ数)(1) / rb
06.151227.009.Stern's diatomic series に現れるフィボナッチ数(2) / rb
06.151227.008.Stern's diatomic series に現れるフィボナッチ数(1) / rb
06.151227.007.Stern's diatomic series(4) / rb
06.151227.006.Stern's diatomic series(3) / rb
06.151227.005.Stern's diatomic series(2) / rb
06.151227.004.Stern's diatomic series(1) / rb
06.151227.003.Calkin–Wilf sequence / rb
06.151227.002.離散力学系における軌道の計算(2) / rb
06.151227.001.離散力学系における軌道の計算(1) / rb
06.151226.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(2) / rb
06.151224.002.Topswops(3) / rb
06.151224.001.Topswops(2) / rb
06.151223.004.Topswops(1) / rb
06.151223.003.郵便切手の問題(3) / rb
06.151223.002.郵便切手の問題(2) / rb
06.151223.001.n! を2^(n - k) で割ると整数か？ / rb
06.151220.003.郵便切手の問題(1) / rb
06.151220.002.連続する整数をkずらすこと
06.151220.001.Josephus problem / rb
06.151219.007.Frobenius number for k consecutive numbers(2) / rb
06.151219.006.Frobenius number for k consecutive numbers(1) / rb
06.151219.005.Frobeniusの硬貨交換問題(5) / rb
06.151219.004.Frobeniusの硬貨交換問題(4) / rb
06.151219.003.Frobeniusの硬貨交換問題(3) / rb
06.151219.002.Frobeniusの硬貨交換問題(2) / rb
06.151219.001.Frobeniusの硬貨交換問題(1) / rb
06.151217.001.周期性をもつ差分方程式 / rb
06.151214.002.Euler brick(2) / rb
06.151214.001.Euler brick(1) / rb
06.151213.004.原始ピタゴラス数の和(2) / rb
06.151213.003.原始ピタゴラス数の和(1) / rb
06.151213.002.Odd primes p such that Pi_{3,1}(p) = Pi_{3,2}(p) - 1 / rb
06.151213.001.Pythagorean prime / rb
06.151212.005.Hilbert prime(3) / rb
06.151212.004.Hilbert prime(2) / rb
06.151212.003.Hilbert prime(1) / rb
06.151212.002.Chebyshev's bias(2) / rb
06.151212.001.Chebyshev's bias(1) / rb
06.151211.001.mapしてflattenすることと flat_map との違い / rb
06.151210.003.Number of partitions of n that do not contain 1 as a part(2) / rb
06.151210.002.Number of partitions of n that do not contain 1 as a part(1) / rb
06.151210.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(2) / rb
06.151209.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(1) / rb
06.151208.001.分割の逆数和が1 / rb
06.151206.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(1) / rb
06.151202.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(2) / rb
06.151129.004.break と exit の違い / rb
06.151129.003.puts と ハッシュ / rb
06.151129.002.正方形の形をした領域内のSelf-avoiding walk(3) / rb
06.151129.001.二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151128.004.正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.003.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.002.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151128.001.正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151127.001.二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151125.002.二等辺三角形の形をした領域内のSelf-avoiding walk(2) / rb
06.151125.001.二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151124.001.Dyck path とSelf-avoiding walk の融合(7) / rb
06.151123.006.Dyck path とSelf-avoiding walk の融合(6) / c
06.151123.005.Dyck path とSelf-avoiding walk の融合(5) / c
06.151123.004.Dyck path とSelf-avoiding walk の融合(4) / rb
06.151123.003.Dyck path とSelf-avoiding walk の融合(3) / rb
06.151123.002.Dyck path とSelf-avoiding walk の融合(2) / rb
06.151123.001.Dyck path とSelf-avoiding walk の融合(1) / rb
06.151122.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151122.002.直角二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151122.001.直角二等辺三角形の形をした領域内のSelf-avoiding walk(2) / c
06.151121.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151121.002.Self-avoiding walk(6) / rb
06.151121.001.Self-avoiding walk(5) / c
06.151118.002.Self-avoiding walk(4) / c
06.151118.001.Self-avoiding walk(3) / c
06.151117.002.Self-avoiding walk(2) / c
06.151117.001.Self-avoiding walk(1) / c
06.151116.001.Number of weakly unimodal partitions of n(2) / rb
06.151115.002.Number of weakly unimodal partitions of n(1) / rb
06.151115.001.Dixon's identity / rb
06.151114.002.Number of directed Hamiltonian paths in mxn grid graph(2) / c
06.151114.001.Number of directed Hamiltonian paths in mxn grid graph(1) / c
06.151113.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(1) / rb
06.151109.004.Number of partitions of n into fourth powers / rb
06.151109.003.Number of partitions of n into cubes / rb
06.151109.002.Number of partitions of n into squares / rb
06.151109.001.Number of palindromic and unimodal compositions of n / rb
06.151108.005.Polite number(5) / rb
06.151108.004.Polite number(4) / rb
06.151108.003.Polite number(3)
06.151108.002.Polite number(2) / rb
06.151108.001.約数の出力 / rb
06.151107.003.Polite number(1) / rb
06.151107.002.(-1)^k (n / k) の和 / rb
06.151107.001.n / k の和 / rb
06.151104.001.Kolakoski sequence(2) / rb
06.151103.002.Kolakoski sequence(1) / rb
06.151103.001.Gauss circle problem(4) / rb
06.151102.001.Gauss circle problem(3) / rb
06.151101.001.Gauss circle problem(2) / rb
06.151031.001.Alternating permutation / rb
06.151025.001.線対称に分割 / rb
06.151024.002.Number of times k is used in writing out all the numbers 0 through n(3)
06.151024.001.Number of times k is used in writing out all the numbers 0 through n(2) / rb
06.151023.001.Number of times k is used in writing out all the numbers 0 through n(1) / rb
06.151022.002.Number of times k is used in writing out all the numbers 1 through n(12)
06.151022.001.Number of times k is used in writing out all the numbers 1 through n(11) / rb
06.151021.001.Number of times k is used in writing out all the numbers 1 through n(10)
06.151020.001.Number of times k is used in writing out all the numbers 1 through n(9) / rb
06.151018.002.Number of times k is used in writing out all the numbers 1 through n(8) / rb
06.151018.001.Number of times k is used in writing out all the numbers 1 through n(7) / rb
06.151013.002.Number of times k is used in writing out all the numbers 1 through n(6) / rb
06.151013.001.Number of times k is used in writing out all the numbers 1 through n(5) / rb
06.151012.007.Number of times k is used in writing out all the numbers 1 through n(4) / rb
06.151012.006.Number of times k is used in writing out all the numbers 1 through n(3) / rb
06.151012.005.Number of times k is used in writing out all the numbers 1 through n(2) / rb
06.151012.004.Number of times k is used in writing out all the numbers 1 through n(1) / rb
06.151012.003.Number of times 1 is used in writing out all the numbers 1 through n(7) / rb
06.151012.002.Number of times 1 is used in writing out all the numbers 1 through n(6) / rb
06.151012.001.Number of times 1 is used in writing out all the numbers 1 through n(5) / rb
06.151011.005.Number of times 1 is used in writing out all the numbers 1 through n(4) / rb
06.151011.004.Number of times 1 is used in writing out all the numbers 1 through n(3) / rb
06.151011.003.Number of times 1 is used in writing out all the numbers 1 through n(2) / rb
06.151011.002.Number of times 1 is used in writing out all the numbers 1 through n(1) / rb
06.151011.001.整数零点 / rb
06.151004.004.素数が無数に存在すること(2) / rb
06.151004.003.素数が無数に存在すること(1) / rb
06.151004.002.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(2) / rb
06.151004.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(1) / rb
06.150929.001.オイラー関数のベキ(3) / rb
06.150927.002.オイラー関数のベキ(2) / rb
06.150927.001.k角数定理？ / rb
06.150924.001.オイラー関数のベキ(1) / rb
06.150922.002.フリーマン・ダイソンによるτ関数に関する公式 / rb
06.150922.001.Ulam spiral / rb
06.150921.003.階段状に現れるフィボナッチ数列 / rb
06.150921.002.縦読み、横読みの一般化 / rb
06.150921.001.Half-Catalan number / rb
06.150920.001.分割が絡んだ係数について / rb
06.150919.001.二重根号が外れてきれいになる式 / rb
06.150915.001.ラマヌジャンが見つけた等式 / rb
06.150914.002.xx + 27yy 型の素数 / rb
06.150914.001.Number of knight's tours on a m×n chessboard(3) / c
06.150913.001.Number of knight's tours on a m×n chessboard(2) / c
06.150912.001.Number of knight's tours on a m×n chessboard(1) / c
06.150910.002.コード用
06.150910.001.Number of knight's tours on a 3×k chessboard(2) / rb
06.150908.001.Number of knight's tours on a 3×k chessboard(1) / c
06.150904.001.桂馬飛び / rb
06.150903.001.p^n + s^n = q^n + r^n / rb
06.150902.001.p^5 + s^5 = q^5 + r^5 / rb
06.150830.003.p^4 + s^4 = q^4 + r^4 / rb
06.150830.002.アフィン暗号(2) / rb
06.150830.001.アフィン暗号(1) / rb
06.150829.001.ラマヌジャン予想(6)
06.150828.001.どの２つの和も平方数(4) / rb
06.150827.001.どの２つの和も平方数(3) / rb
06.150824.006.どの２つの和も立方数(16) / rb
06.150824.005.どの２つの和も立方数(15) / rb
06.150824.004.どの２つの和も立方数(14) / rb
06.150824.003.どの２つの和も立方数(13) / rb
06.150824.002.どの２つの和も立方数(12) / rb
06.150824.001.どの２つの和も立方数(11) / rb
06.150823.007.どの２つの和も立方数(10) / rb
06.150823.006.どの２つの和も立方数(9) / rb
06.150823.005.どの２つの和も立方数(8) / rb
06.150823.004.どの２つの和も立方数(7) / rb
06.150823.003.どの２つの和も立方数(6) / rb
06.150823.002.どの２つの和も立方数(5) / rb
06.150823.001.どの２つの和も立方数(4) / rb
06.150822.004.どの２つの和も立方数(3) / rb
06.150822.003.累乗数 / rb
06.150822.002.どの２つの和も立方数(2) / rb
06.150822.001.どの２つの和も立方数(1) / rb
06.150821.001.どの２つの和も平方数(2) / rb
06.150820.001.どの２つの和も平方数(1) / rb
06.150816.002.円周率 / rb
06.150816.001.高次元カタラン数 / rb
06.150815.001.隣り合う素数の差と積 / rb
06.150806.002.Number of n-digit right-truncatable primes / rb
06.150806.001.Right-truncatable prime / rb
06.150805.001.タウ函数の合同関係 / rb
06.150804.001.Pisano period / rb
06.150803.002.Almost Integer / rb
06.150803.001.4p - 1 型のヘーグナー数の性質 / rb
06.150802.001.ラマヌジャン予想(5) / py
06.150801.003.Ramanujan's tau function(3) / py
06.150801.002.ラマヌジャン予想(4) / rb
06.150801.001.
06.150731.002.
06.150731.001.ラマヌジャン予想(3) / rb
06.150730.001.ラマヌジャン予想(2) / rb
06.150728.002.ラマヌジャン予想(1) / rb
06.150728.001.Ramanujan's tau function(2) / rb
06.150727.003.Ramanujan's tau function(1) / rb
06.150727.002.Reverse and Add(2) / rb
06.150727.001.Reverse and Add(1) / rb
06.150726.005.回文数式 / rb
06.150726.004.Bell number / rb
06.150726.003.1 / n の性質について(1) / rb
06.150726.002.Primes of the form identical odd digits followed by a 1 / rb
06.150726.001.Prime numbers of the form 33…331 / rb
06.150720.003.Collatz conjecture(2) / rb
06.150720.002.Collatz conjecture(1) / rb
06.150720.001.隣接素数の和で表す表し方の数 / rb
06.150719.002.Aliquot sequence(2) / rb
06.150719.001.Aliquot sequence(1) / rb
06.150709.002.素数の個数(5) / rb
06.150709.001.素数の個数(4) / rb
06.150708.001.素数の個数(3) / rb
06.150707.003.素数の個数(2) / rb
06.150707.002.素数の個数(1) / rb
06.150707.001.素数の和 / rb
06.150706.001.Carmichael number / rb
06.150625.001.ROT13 と ROT47 / rb
06.150624.002.素数を順番につなぎ合わせた数について(4) / rb
06.150624.001.素数を順番につなぎ合わせた数について(3) / rb
06.150621.004.素数を順番につなぎ合わせた数について(2) / rb
06.150621.003.素数を順番につなぎ合わせた数について(1) / rb
06.150621.002.2, 3, 5, 7 を使った素数 / rb
06.150621.001.2^i + 3^i + 5^i + 7^i 型の素数 / rb
06.150620.002.i (1以上9以下)を含むならば、i が i 個含む数の個数について(2) / rb
06.150620.001.i (1以上9以下)を含むならば、i が i 個含む数の個数について(1) / rb
06.150613.002.双子素数と隣り合う双子素数の和 / rb
06.150613.001.隣り合う素数の和 / rb
06.150607.003.Look-and-say sequence / rb / RC
06.150607.002.Mian-Chowla sequence / rb
06.150607.001.各桁の和と自身との和について / rb
06.150603.001.塊の個数 / rb
06.150531.002.Gauss circle problem(1) / rb
06.150531.001.Ulam number / rb
06.150529.001.Toothpick Sequence / rb
06.150527.001.φの和 / rb
06.150525.001.Conway-Guy sequence / rb
06.150524.001.「普通の分数の足し算」と「日付の足し算」が一致する組合せ / rb
06.150523.001.2〜Nまでをある規則にしたがって並びかえる / rb
06.150517.001.ｎ進グレイコード ↔ ｎ進表記 / rb
06.150503.003.| σ(i + 1) - σ(1) | ≠ 1 を満たすσの個数 / rb
06.150503.002.3 6 9 2 5 8 1 4 7 (2) / rb
06.150503.001.Ducci sequence / rb
06.150502.001.3 6 9 2 5 8 1 4 7 (1) / rb
06.150429.001.p(n | 和因子は相異なる) / rb
06.150425.002.p(n | 和因子は奇数) / rb
06.150425.001.Taxi-cab numbers: sums of 2 cubes in more than 1 way / rb
06.150422.001.カプレカ数 / rb
06.150419.001.864197532（高速化） / rb
06.150418.002.864197532 / rb
06.150418.001.Lucas、Perrin そして McIrvin（剰余について） / rb
06.150414.001.Lucas、Perrin そして McIrvin / rb
06.150413.002.Thue–Morse sequence / rb
06.150413.001.Schizophrenic number（連続する個数 2.0） / rb
06.150412.001.Schizophrenic number（連続する個数 1.0） / rb
06.150410.001.Schizophrenic number / rb
06.150405.003.Generalization of the Zeckendorf representation / rb
06.150405.002.Zeckendorf number representation / rb / RC
06.150405.001.Self-descriptive number / rb
06.150330.001.Heterosquare / rb
06.150329.004.Connell Sequence / rb
06.150329.003.21397 / rb
06.150329.002.Göbel's Sequence / rb
06.150329.001.Somos-k sequence / rb
06.150328.001.Perrin Pseudoprime / rb
06.150323.001.
06.150315.001.不思議数 / rb
06.150301.002.
06.150301.001.Silverman's Sequence / rb
06.150225.001.Square-free integer / rb
06.150224.002.Cyclic number / rb
06.150224.001.
06.150111.001.バイナリサーチ / rb
06.150110.004.リニアサーチ / rb
06.150110.003.マージソート / rb
06.150110.002.クイックソート / rb
06.150110.001.バブルソート / rb
06.150104.002.「n-クイーン」パズル / rb
06.150104.001.ナップザック問題 / rb
06.141027.001.Partition / py
06.140927.002.Lucky prime / rb
06.140927.001.Lucky number / rb
06.140831.001.Partition（高速化） / rb
06.140823.004.Prime Partition / rb
06.140823.003.Partition / rb
06.140823.002.
06.140823.001.
06.140813.001.最大増加部分列 / rb
06.140316.001.548834 / rb
06.140306.001.覆面算（SEND + MORE = MONEY） / rb
02.150822.001.連続する自然数の積は平方数ではない
02.130120.002.On the Inequality with Power-Exponential Function
02.130120.001.
09.160307.001.この記事
09.160131.001.
09.160101.001.
09.151129.001.
09.151108.001.
09.151031.001.
09.151012.001.
09.150927.001.
09.150913.001.
09.150829.001.
09.150827.001.
09.150822.001.
09.150815.001.
09.150801.001.
09.150727.001.
09.150720.001.
09.150706.001.
09.150607.001.
09.150531.001.
09.150529.001.
09.150525.001.
09.150503.001.
09.150418.001.
09.150412.001.
09.150405.001.
09.150330.001.
09.150329.001.
rb Ruby
py Python
RC Rosetta Codeにもコードあり
Heroku
08.150308.001.Clock sequence / rb
06.160306.005.a × b = 10^i + 1 / rb
06.160306.004.Numbers n such that n concatenated with itself is a biperiod square(2) / rb
06.160306.003.Numbers n such that n concatenated with itself is a biperiod square(1) / rb
06.160306.002.Ordered Bell number(4) / rb
06.160306.001.Ordered Bell number(3) / rb
06.160305.003.Ordered Bell number(2) / rb
06.160305.002.Ordered Bell number(1) / rb
06.160305.001.Number of unitary divisors of n / rb
06.160304.001.Ramanujan prime(3) / rb
06.160302.003.Ramanujan prime(2) / rb
06.160302.002.Ramanujan prime(1) / rb
06.160302.001.素数の個数(7) / rb
06.160228.003.Borwein integral / rb
06.160228.002.Ei(1) - γ / rb
06.160228.001.φ(n) / (x^n - 1) の和(2)
06.160227.003.φ(n) / (x^n - 1) の和(1) / rb
06.160227.002.隣り合う階乗の和(5) / rb
06.160227.001.隣り合う階乗の和(4)
06.160225.003.隣り合う階乗の和(3) / rb
06.160225.002.隣り合う階乗の和(2) / rb
06.160225.001.隣り合う階乗の和(1) / rb
06.160223.002.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(5)
06.160223.001.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(4) / rb
06.160221.004.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(3) / rb
06.160221.003.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(2) / rb
06.160221.002.Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0(1) / rb
06.160221.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(5) / rb
06.160220.003.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(4) / rb
06.160220.002.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(3) / rb
06.160220.001.素数の個数(6) / rb
06.160218.001.パスカルの三角形におけるp^4 を法とする合同(4) / rb
06.160217.003.パスカルの三角形におけるp^4 を法とする合同(3)
06.160217.002.パスカルの三角形におけるp^4 を法とする合同(2) / rb
06.160217.001.Primes consisting of a digit and a string of 9's / rb
06.160215.001.パスカルの三角形におけるp^4 を法とする合同(1) / rb
06.160214.002.A generalization of Wolstenholme’s Theorem / rb
06.160214.001.調和数の分子と分母 / rb
06.160210.001.Hop-over Puzzle(6) / rb
06.160209.001.Hop-over Puzzle(5) / rb
06.160208.004.Hop-over Puzzle(4) / rb
06.160208.003.Hop-over Puzzle(3) / rb
06.160208.002.Hop-over Puzzle(2) / rb
06.160208.001.Hop-over Puzzle(1) / rb
06.160207.001.アプリの削除 / Heroku
06.160206.002.原始的アイゼンシュタイン三角形と原始的タレース三角形(2) / rb
06.160206.001.原始的アイゼンシュタイン三角形と原始的タレース三角形(1) / rb
06.160130.001.引き算魔方陣 / rb
06.160128.001.誤っているようで誤っていない数式 / rb
06.160126.001.「和の２乗 = ３乗の和」となる組合せ(4) / rb
06.160124.001.「和の２乗 = ３乗の和」となる組合せ(3) / rb
06.160123.002.「和の２乗 = ３乗の和」となる組合せ(2)
06.160123.001.「和の２乗 = ３乗の和」となる組合せ(1) / rb
06.160117.002.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(3) / rb
06.160117.001.Lander, Parkin, and Selfridge conjecture / rb
06.160114.001.√5 の近似値の連分数展開(2) / rb
06.160113.001.√5 の近似値の連分数展開(1) / rb
06.160112.002.n と互いに素なn 未満の自然数の和 / rb
06.160112.001.単位分数の和が1 / 2(3) / rb
06.160111.003.単位分数の和が1 / 2(2) / rb
06.160111.002.単位分数の和が1 / 2(1) / rb
06.160111.001.逆数をとり、単位分数を加えていく数列 / rb
06.160109.006.9 × (10^(18n) - 1) / 19 の性質について(5) / rb
06.160109.005.9 × (10^(18n) - 1) / 19 の性質について(4) / rb
06.160109.004.9 × (10^(18n) - 1) / 19 の性質について(3) / rb
06.160109.003.9 × (10^(18n) - 1) / 19 の性質について(2) / rb
06.160109.002.9 × (10^(18n) - 1) / 19 の性質について(1) / rb
06.160109.001.19 / 89 … 91 の性質について / rb
06.160108.002.1 / n の性質について(3) / rb
06.160108.001.1 / n の性質について(2) / rb
06.160106.003.異なる単位分数（< 1）の和が1 より大きい自然数(2) / rb
06.160106.002.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(2) / rb
06.160106.001.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(1) / rb
06.160105.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(3) / rb
06.160104.002.Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,....,n,n,n} with no two consecutive terms equal / rb
06.160104.001.異なる単位分数（< 1）の和が1 より大きい自然数(1) / rb
06.160103.006.Arrangement of the word 'Success' / rb
06.160103.005.注意書き / rb
06.160103.004.A190945(100)(4) / rb
06.160103.003.A190945(100)(3) / rb
06.160103.002.A190945(100)(2) / rb
06.160103.001.A190945(100)(1)
06.160101.002.p(pn | 和因子は素数)(3) / rb
06.160101.001.Riffle Shuffle / rb
06.151231.007.Numbers that are not the sum of distinct pentagonal numbers / rb
06.151231.006.Numbers that are not the sum of distinct squares / rb
06.151231.005.Numbers that are not the sum of distinct triangular numbers / rb
06.151231.004.12桁の数字
06.151231.003.p(n^4 | 和因子は四乗数) / rb
06.151231.002.p(n^3 | 和因子は立方数) / rb
06.151231.001.p(n^2 | 和因子は平方数) / rb
06.151230.004.p(pn | 和因子は素数)(2) / rb
06.151230.003.p(pn | 和因子は素数)(1) / rb
06.151230.002.p(Fn | 和因子はフィボナッチ数)(2) / rb
06.151230.001.p(Fn | 和因子はフィボナッチ数)(1) / rb
06.151228.002.p(n | 和因子はフィボナッチ数)(2) / rb
06.151228.001.p(n | 和因子はフィボナッチ数)(1) / rb
06.151227.009.Stern's diatomic series に現れるフィボナッチ数(2) / rb
06.151227.008.Stern's diatomic series に現れるフィボナッチ数(1) / rb
06.151227.007.Stern's diatomic series(4) / rb
06.151227.006.Stern's diatomic series(3) / rb
06.151227.005.Stern's diatomic series(2) / rb
06.151227.004.Stern's diatomic series(1) / rb
06.151227.003.Calkin–Wilf sequence / rb
06.151227.002.離散力学系における軌道の計算(2) / rb
06.151227.001.離散力学系における軌道の計算(1) / rb
06.151226.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(2) / rb
06.151224.002.Topswops(3) / rb
06.151224.001.Topswops(2) / rb
06.151223.004.Topswops(1) / rb
06.151223.003.郵便切手の問題(3) / rb
06.151223.002.郵便切手の問題(2) / rb
06.151223.001.n! を2^(n - k) で割ると整数か？ / rb
06.151220.003.郵便切手の問題(1) / rb
06.151220.002.連続する整数をkずらすこと
06.151220.001.Josephus problem / rb
06.151219.007.Frobenius number for k consecutive numbers(2) / rb
06.151219.006.Frobenius number for k consecutive numbers(1) / rb
06.151219.005.Frobeniusの硬貨交換問題(5) / rb
06.151219.004.Frobeniusの硬貨交換問題(4) / rb
06.151219.003.Frobeniusの硬貨交換問題(3) / rb
06.151219.002.Frobeniusの硬貨交換問題(2) / rb
06.151219.001.Frobeniusの硬貨交換問題(1) / rb
06.151217.001.周期性をもつ差分方程式 / rb
06.151214.002.Euler brick(2) / rb
06.151214.001.Euler brick(1) / rb
06.151213.004.原始ピタゴラス数の和(2) / rb
06.151213.003.原始ピタゴラス数の和(1) / rb
06.151213.002.Odd primes p such that Pi_{3,1}(p) = Pi_{3,2}(p) - 1 / rb
06.151213.001.Pythagorean prime / rb
06.151212.005.Hilbert prime(3) / rb
06.151212.004.Hilbert prime(2) / rb
06.151212.003.Hilbert prime(1) / rb
06.151212.002.Chebyshev's bias(2) / rb
06.151212.001.Chebyshev's bias(1) / rb
06.151211.001.mapしてflattenすることと flat_map との違い / rb
06.151210.003.Number of partitions of n that do not contain 1 as a part(2) / rb
06.151210.002.Number of partitions of n that do not contain 1 as a part(1) / rb
06.151210.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(2) / rb
06.151209.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(1) / rb
06.151208.001.分割の逆数和が1 / rb
06.151206.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(1) / rb
06.151202.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(2) / rb
06.151129.004.break と exit の違い / rb
06.151129.003.puts と ハッシュ / rb
06.151129.002.正方形の形をした領域内のSelf-avoiding walk(3) / rb
06.151129.001.二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151128.004.正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.003.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.002.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151128.001.正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151127.001.二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151125.002.二等辺三角形の形をした領域内のSelf-avoiding walk(2) / rb
06.151125.001.二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151124.001.Dyck path とSelf-avoiding walk の融合(7) / rb
06.151123.006.Dyck path とSelf-avoiding walk の融合(6) / c
06.151123.005.Dyck path とSelf-avoiding walk の融合(5) / c
06.151123.004.Dyck path とSelf-avoiding walk の融合(4) / rb
06.151123.003.Dyck path とSelf-avoiding walk の融合(3) / rb
06.151123.002.Dyck path とSelf-avoiding walk の融合(2) / rb
06.151123.001.Dyck path とSelf-avoiding walk の融合(1) / rb
06.151122.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151122.002.直角二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151122.001.直角二等辺三角形の形をした領域内のSelf-avoiding walk(2) / c
06.151121.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151121.002.Self-avoiding walk(6) / rb
06.151121.001.Self-avoiding walk(5) / c
06.151118.002.Self-avoiding walk(4) / c
06.151118.001.Self-avoiding walk(3) / c
06.151117.002.Self-avoiding walk(2) / c
06.151117.001.Self-avoiding walk(1) / c
06.151116.001.Number of weakly unimodal partitions of n(2) / rb
06.151115.002.Number of weakly unimodal partitions of n(1) / rb
06.151115.001.Dixon's identity / rb
06.151114.002.Number of directed Hamiltonian paths in mxn grid graph(2) / c
06.151114.001.Number of directed Hamiltonian paths in mxn grid graph(1) / c
06.151113.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(1) / rb
06.151109.004.Number of partitions of n into fourth powers / rb
06.151109.003.Number of partitions of n into cubes / rb
06.151109.002.Number of partitions of n into squares / rb
06.151109.001.Number of palindromic and unimodal compositions of n / rb
06.151108.005.Polite number(5) / rb
06.151108.004.Polite number(4) / rb
06.151108.003.Polite number(3)
06.151108.002.Polite number(2) / rb
06.151108.001.約数の出力 / rb
06.151107.003.Polite number(1) / rb
06.151107.002.(-1)^k (n / k) の和 / rb
06.151107.001.n / k の和 / rb
06.151104.001.Kolakoski sequence(2) / rb
06.151103.002.Kolakoski sequence(1) / rb
06.151103.001.Gauss circle problem(4) / rb
06.151102.001.Gauss circle problem(3) / rb
06.151101.001.Gauss circle problem(2) / rb
06.151031.001.Alternating permutation / rb
06.151025.001.線対称に分割 / rb
06.151024.002.Number of times k is used in writing out all the numbers 0 through n(3)
06.151024.001.Number of times k is used in writing out all the numbers 0 through n(2) / rb
06.151023.001.Number of times k is used in writing out all the numbers 0 through n(1) / rb
06.151022.002.Number of times k is used in writing out all the numbers 1 through n(12)
06.151022.001.Number of times k is used in writing out all the numbers 1 through n(11) / rb
06.151021.001.Number of times k is used in writing out all the numbers 1 through n(10)
06.151020.001.Number of times k is used in writing out all the numbers 1 through n(9) / rb
06.151018.002.Number of times k is used in writing out all the numbers 1 through n(8) / rb
06.151018.001.Number of times k is used in writing out all the numbers 1 through n(7) / rb
06.151013.002.Number of times k is used in writing out all the numbers 1 through n(6) / rb
06.151013.001.Number of times k is used in writing out all the numbers 1 through n(5) / rb
06.151012.007.Number of times k is used in writing out all the numbers 1 through n(4) / rb
06.151012.006.Number of times k is used in writing out all the numbers 1 through n(3) / rb
06.151012.005.Number of times k is used in writing out all the numbers 1 through n(2) / rb
06.151012.004.Number of times k is used in writing out all the numbers 1 through n(1) / rb
06.151012.003.Number of times 1 is used in writing out all the numbers 1 through n(7) / rb
06.151012.002.Number of times 1 is used in writing out all the numbers 1 through n(6) / rb
06.151012.001.Number of times 1 is used in writing out all the numbers 1 through n(5) / rb
06.151011.005.Number of times 1 is used in writing out all the numbers 1 through n(4) / rb
06.151011.004.Number of times 1 is used in writing out all the numbers 1 through n(3) / rb
06.151011.003.Number of times 1 is used in writing out all the numbers 1 through n(2) / rb
06.151011.002.Number of times 1 is used in writing out all the numbers 1 through n(1) / rb
06.151011.001.整数零点 / rb
06.151004.004.素数が無数に存在すること(2) / rb
06.151004.003.素数が無数に存在すること(1) / rb
06.151004.002.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(2) / rb
06.151004.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(1) / rb
06.150929.001.オイラー関数のベキ(3) / rb
06.150927.002.オイラー関数のベキ(2) / rb
06.150927.001.k角数定理？ / rb
06.150924.001.オイラー関数のベキ(1) / rb
06.150922.002.フリーマン・ダイソンによるτ関数に関する公式 / rb
06.150922.001.Ulam spiral / rb
06.150921.003.階段状に現れるフィボナッチ数列 / rb
06.150921.002.縦読み、横読みの一般化 / rb
06.150921.001.Half-Catalan number / rb
06.150920.001.分割が絡んだ係数について / rb
06.150919.001.二重根号が外れてきれいになる式 / rb
06.150915.001.ラマヌジャンが見つけた等式 / rb
06.150914.002.xx + 27yy 型の素数 / rb
06.150914.001.Number of knight's tours on a m×n chessboard(3) / c
06.150913.001.Number of knight's tours on a m×n chessboard(2) / c
06.150912.001.Number of knight's tours on a m×n chessboard(1) / c
06.150910.002.コード用
06.150910.001.Number of knight's tours on a 3×k chessboard(2) / rb
06.150908.001.Number of knight's tours on a 3×k chessboard(1) / c
06.150904.001.桂馬飛び / rb
06.150903.001.p^n + s^n = q^n + r^n / rb
06.150902.001.p^5 + s^5 = q^5 + r^5 / rb
06.150830.003.p^4 + s^4 = q^4 + r^4 / rb
06.150830.002.アフィン暗号(2) / rb
06.150830.001.アフィン暗号(1) / rb
06.150829.001.ラマヌジャン予想(6)
06.150828.001.どの２つの和も平方数(4) / rb
06.150827.001.どの２つの和も平方数(3) / rb
06.150824.006.どの２つの和も立方数(16) / rb
06.150824.005.どの２つの和も立方数(15) / rb
06.150824.004.どの２つの和も立方数(14) / rb
06.150824.003.どの２つの和も立方数(13) / rb
06.150824.002.どの２つの和も立方数(12) / rb
06.150824.001.どの２つの和も立方数(11) / rb
06.150823.007.どの２つの和も立方数(10) / rb
06.150823.006.どの２つの和も立方数(9) / rb
06.150823.005.どの２つの和も立方数(8) / rb
06.150823.004.どの２つの和も立方数(7) / rb
06.150823.003.どの２つの和も立方数(6) / rb
06.150823.002.どの２つの和も立方数(5) / rb
06.150823.001.どの２つの和も立方数(4) / rb
06.150822.004.どの２つの和も立方数(3) / rb
06.150822.003.累乗数 / rb
06.150822.002.どの２つの和も立方数(2) / rb
06.150822.001.どの２つの和も立方数(1) / rb
06.150821.001.どの２つの和も平方数(2) / rb
06.150820.001.どの２つの和も平方数(1) / rb
06.150816.002.円周率 / rb
06.150816.001.高次元カタラン数 / rb
06.150815.001.隣り合う素数の差と積 / rb
06.150806.002.Number of n-digit right-truncatable primes / rb
06.150806.001.Right-truncatable prime / rb
06.150805.001.タウ函数の合同関係 / rb
06.150804.001.Pisano period / rb
06.150803.002.Almost Integer / rb
06.150803.001.4p - 1 型のヘーグナー数の性質 / rb
06.150802.001.ラマヌジャン予想(5) / py
06.150801.003.Ramanujan's tau function(3) / py
06.150801.002.ラマヌジャン予想(4) / rb
06.150801.001.
06.150731.002.
06.150731.001.ラマヌジャン予想(3) / rb
06.150730.001.ラマヌジャン予想(2) / rb
06.150728.002.ラマヌジャン予想(1) / rb
06.150728.001.Ramanujan's tau function(2) / rb
06.150727.003.Ramanujan's tau function(1) / rb
06.150727.002.Reverse and Add(2) / rb
06.150727.001.Reverse and Add(1) / rb
06.150726.005.回文数式 / rb
06.150726.004.Bell number / rb
06.150726.003.1 / n の性質について(1) / rb
06.150726.002.Primes of the form identical odd digits followed by a 1 / rb
06.150726.001.Prime numbers of the form 33…331 / rb
06.150720.003.Collatz conjecture(2) / rb
06.150720.002.Collatz conjecture(1) / rb
06.150720.001.隣接素数の和で表す表し方の数 / rb
06.150719.002.Aliquot sequence(2) / rb
06.150719.001.Aliquot sequence(1) / rb
06.150709.002.素数の個数(5) / rb
06.150709.001.素数の個数(4) / rb
06.150708.001.素数の個数(3) / rb
06.150707.003.素数の個数(2) / rb
06.150707.002.素数の個数(1) / rb
06.150707.001.素数の和 / rb
06.150706.001.Carmichael number / rb
06.150625.001.ROT13 と ROT47 / rb
06.150624.002.素数を順番につなぎ合わせた数について(4) / rb
06.150624.001.素数を順番につなぎ合わせた数について(3) / rb
06.150621.004.素数を順番につなぎ合わせた数について(2) / rb
06.150621.003.素数を順番につなぎ合わせた数について(1) / rb
06.150621.002.2, 3, 5, 7 を使った素数 / rb
06.150621.001.2^i + 3^i + 5^i + 7^i 型の素数 / rb
06.150620.002.i (1以上9以下)を含むならば、i が i 個含む数の個数について(2) / rb
06.150620.001.i (1以上9以下)を含むならば、i が i 個含む数の個数について(1) / rb
06.150613.002.双子素数と隣り合う双子素数の和 / rb
06.150613.001.隣り合う素数の和 / rb
06.150607.003.Look-and-say sequence / rb / RC
06.150607.002.Mian-Chowla sequence / rb
06.150607.001.各桁の和と自身との和について / rb
06.150603.001.塊の個数 / rb
06.150531.002.Gauss circle problem(1) / rb
06.150531.001.Ulam number / rb
06.150529.001.Toothpick Sequence / rb
06.150527.001.φの和 / rb
06.150525.001.Conway-Guy sequence / rb
06.150524.001.「普通の分数の足し算」と「日付の足し算」が一致する組合せ / rb
06.150523.001.2〜Nまでをある規則にしたがって並びかえる / rb
06.150517.001.ｎ進グレイコード ↔ ｎ進表記 / rb
06.150503.003.| σ(i + 1) - σ(1) | ≠ 1 を満たすσの個数 / rb
06.150503.002.3 6 9 2 5 8 1 4 7 (2) / rb
06.150503.001.Ducci sequence / rb
06.150502.001.3 6 9 2 5 8 1 4 7 (1) / rb
06.150429.001.p(n | 和因子は相異なる) / rb
06.150425.002.p(n | 和因子は奇数) / rb
06.150425.001.Taxi-cab numbers: sums of 2 cubes in more than 1 way / rb
06.150422.001.カプレカ数 / rb
06.150419.001.864197532（高速化） / rb
06.150418.002.864197532 / rb
06.150418.001.Lucas、Perrin そして McIrvin（剰余について） / rb
06.150414.001.Lucas、Perrin そして McIrvin / rb
06.150413.002.Thue–Morse sequence / rb
06.150413.001.Schizophrenic number（連続する個数 2.0） / rb
06.150412.001.Schizophrenic number（連続する個数 1.0） / rb
06.150410.001.Schizophrenic number / rb
06.150405.003.Generalization of the Zeckendorf representation / rb
06.150405.002.Zeckendorf number representation / rb / RC
06.150405.001.Self-descriptive number / rb
06.150330.001.Heterosquare / rb
06.150329.004.Connell Sequence / rb
06.150329.003.21397 / rb
06.150329.002.Göbel's Sequence / rb
06.150329.001.Somos-k sequence / rb
06.150328.001.Perrin Pseudoprime / rb
06.150323.001.
06.150315.001.不思議数 / rb
06.150301.002.
06.150301.001.Silverman's Sequence / rb
06.150225.001.Square-free integer / rb
06.150224.002.Cyclic number / rb
06.150224.001.
06.150111.001.バイナリサーチ / rb
06.150110.004.リニアサーチ / rb
06.150110.003.マージソート / rb
06.150110.002.クイックソート / rb
06.150110.001.バブルソート / rb
06.150104.002.「n-クイーン」パズル / rb
06.150104.001.ナップザック問題 / rb
06.141027.001.Partition / py
06.140927.002.Lucky prime / rb
06.140927.001.Lucky number / rb
06.140831.001.Partition（高速化） / rb
06.140823.004.Prime Partition / rb
06.140823.003.Partition / rb
06.140823.002.
06.140823.001.
06.140813.001.最大増加部分列 / rb
06.140316.001.548834 / rb
06.140306.001.覆面算（SEND + MORE = MONEY） / rb
02.150822.001.連続する自然数の積は平方数ではない
02.130120.002.On the Inequality with Power-Exponential Function
02.130120.001.
09.160307.001.この記事
09.160131.001.
09.160101.001.
09.151129.001.
09.151108.001.
09.151031.001.
09.151012.001.
09.150927.001.
09.150913.001.
09.150829.001.
09.150827.001.
09.150822.001.
09.150815.001.
09.150801.001.
09.150727.001.
09.150720.001.
09.150706.001.
09.150607.001.
09.150531.001.
09.150529.001.
09.150525.001.
09.150503.001.
09.150418.001.
09.150412.001.
09.150405.001.
09.150330.001.
09.150329.001.
2016年1月31日日曜日
160131
c C
rb Ruby
py Python
RC Rosetta Codeにもコードあり
08.150308.001.Clock sequence / rb
06.160130.001.引き算魔方陣 / rb
06.160128.001.誤っているようで誤っていない数式 / rb
06.160126.001.「和の２乗 = ３乗の和」となる組合せ(4) / rb
06.160124.001.「和の２乗 = ３乗の和」となる組合せ(3) / rb
06.160123.002.「和の２乗 = ３乗の和」となる組合せ(2)
06.160123.001.「和の２乗 = ３乗の和」となる組合せ(1) / rb
06.160117.002.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(3) / rb
06.160117.001.Lander, Parkin, and Selfridge conjecture / rb
06.160114.001.√5 の近似値の連分数展開(2) / rb
06.160113.001.√5 の近似値の連分数展開(1) / rb
06.160112.002.n と互いに素なn 未満の自然数の和 / rb
06.160112.001.単位分数の和が1 / 2(3) / rb
06.160111.003.単位分数の和が1 / 2(2) / rb
06.160111.002.単位分数の和が1 / 2(1) / rb
06.160111.001.逆数をとり、単位分数を加えていく数列 / rb
06.160109.006.9 × (10^(18n) - 1) / 19 の性質について(5) / rb
06.160109.005.9 × (10^(18n) - 1) / 19 の性質について(4) / rb
06.160109.004.9 × (10^(18n) - 1) / 19 の性質について(3) / rb
06.160109.003.9 × (10^(18n) - 1) / 19 の性質について(2) / rb
06.160109.002.9 × (10^(18n) - 1) / 19 の性質について(1) / rb
06.160109.001.19 / 89 … 91 の性質について / rb
06.160108.002.1 / n の性質について(3) / rb
06.160108.001.1 / n の性質について(2) / rb
06.160106.003.異なる単位分数（< 1）の和が1 より大きい自然数(2) / rb
06.160106.002.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(2) / rb
06.160106.001.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(1) / rb
06.160105.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(3) / rb
06.160104.002.Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,....,n,n,n} with no two consecutive terms equal / rb
06.160104.001.異なる単位分数（< 1）の和が1 より大きい自然数(1) / rb
06.160103.006.Arrangement of the word 'Success' / rb
06.160103.005.注意書き / rb
06.160103.004.A190945(100)(4) / rb
06.160103.003.A190945(100)(3) / rb
06.160103.002.A190945(100)(2) / rb
06.160103.001.A190945(100)(1)
06.160101.002.p(pn | 和因子は素数)(3) / rb
06.160101.001.Riffle Shuffle / rb
06.151231.007.Numbers that are not the sum of distinct pentagonal numbers / rb
06.151231.006.Numbers that are not the sum of distinct squares / rb
06.151231.005.Numbers that are not the sum of distinct triangular numbers / rb
06.151231.004.12桁の数字
06.151231.003.p(n^4 | 和因子は四乗数) / rb
06.151231.002.p(n^3 | 和因子は立方数) / rb
06.151231.001.p(n^2 | 和因子は平方数) / rb
06.151230.004.p(pn | 和因子は素数)(2) / rb
06.151230.003.p(pn | 和因子は素数)(1) / rb
06.151230.002.p(Fn | 和因子はフィボナッチ数)(2) / rb
06.151230.001.p(Fn | 和因子はフィボナッチ数)(1) / rb
06.151228.002.p(n | 和因子はフィボナッチ数)(2) / rb
06.151228.001.p(n | 和因子はフィボナッチ数)(1) / rb
06.151227.009.Stern's diatomic series に現れるフィボナッチ数(2) / rb
06.151227.008.Stern's diatomic series に現れるフィボナッチ数(1) / rb
06.151227.007.Stern's diatomic series(4) / rb
06.151227.006.Stern's diatomic series(3) / rb
06.151227.005.Stern's diatomic series(2) / rb
06.151227.004.Stern's diatomic series(1) / rb
06.151227.003.Calkin–Wilf sequence / rb
06.151227.002.離散力学系における軌道の計算(2) / rb
06.151227.001.離散力学系における軌道の計算(1) / rb
06.151226.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(2) / rb
06.151224.002.Topswops(3) / rb
06.151224.001.Topswops(2) / rb
06.151223.004.Topswops(1) / rb
06.151223.003.郵便切手の問題(3) / rb
06.151223.002.郵便切手の問題(2) / rb
06.151223.001.n! を2^(n - k) で割ると整数か？ / rb
06.151220.003.郵便切手の問題(1) / rb
06.151220.002.連続する整数をkずらすこと
06.151220.001.Josephus problem / rb
06.151219.007.Frobenius number for k consecutive numbers(2) / rb
06.151219.006.Frobenius number for k consecutive numbers(1) / rb
06.151219.005.Frobeniusの硬貨交換問題(5) / rb
06.151219.004.Frobeniusの硬貨交換問題(4) / rb
06.151219.003.Frobeniusの硬貨交換問題(3) / rb
06.151219.002.Frobeniusの硬貨交換問題(2) / rb
06.151219.001.Frobeniusの硬貨交換問題(1) / rb
06.151217.001.周期性をもつ差分方程式 / rb
06.151214.002.Euler brick(2) / rb
06.151214.001.Euler brick(1) / rb
06.151213.004.原始ピタゴラス数の和(2) / rb
06.151213.003.原始ピタゴラス数の和(1) / rb
06.151213.002.Odd primes p such that Pi_{3,1}(p) = Pi_{3,2}(p) - 1 / rb
06.151213.001.Pythagorean prime / rb
06.151212.005.Hilbert prime(3) / rb
06.151212.004.Hilbert prime(2) / rb
06.151212.003.Hilbert prime(1) / rb
06.151212.002.Chebyshev's bias(2) / rb
06.151212.001.Chebyshev's bias(1) / rb
06.151211.001.mapしてflattenすることと flat_map との違い / rb
06.151210.003.Number of partitions of n that do not contain 1 as a part(2) / rb
06.151210.002.Number of partitions of n that do not contain 1 as a part(1) / rb
06.151210.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(2) / rb
06.151209.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(1) / rb
06.151208.001.分割の逆数和が1 / rb
06.151206.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(1) / rb
06.151202.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(2) / rb
06.151129.004.break と exit の違い / rb
06.151129.003.puts と ハッシュ / rb
06.151129.002.正方形の形をした領域内のSelf-avoiding walk(3) / rb
06.151129.001.二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151128.004.正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.003.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.002.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151128.001.正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151127.001.二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151125.002.二等辺三角形の形をした領域内のSelf-avoiding walk(2) / rb
06.151125.001.二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151124.001.Dyck path とSelf-avoiding walk の融合(7) / rb
06.151123.006.Dyck path とSelf-avoiding walk の融合(6) / c
06.151123.005.Dyck path とSelf-avoiding walk の融合(5) / c
06.151123.004.Dyck path とSelf-avoiding walk の融合(4) / rb
06.151123.003.Dyck path とSelf-avoiding walk の融合(3) / rb
06.151123.002.Dyck path とSelf-avoiding walk の融合(2) / rb
06.151123.001.Dyck path とSelf-avoiding walk の融合(1) / rb
06.151122.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151122.002.直角二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151122.001.直角二等辺三角形の形をした領域内のSelf-avoiding walk(2) / c
06.151121.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151121.002.Self-avoiding walk(6) / rb
06.151121.001.Self-avoiding walk(5) / c
06.151118.002.Self-avoiding walk(4) / c
06.151118.001.Self-avoiding walk(3) / c
06.151117.002.Self-avoiding walk(2) / c
06.151117.001.Self-avoiding walk(1) / c
06.151116.001.Number of weakly unimodal partitions of n(2) / rb
06.151115.002.Number of weakly unimodal partitions of n(1) / rb
06.151115.001.Dixon's identity / rb
06.151114.002.Number of directed Hamiltonian paths in mxn grid graph(2) / c
06.151114.001.Number of directed Hamiltonian paths in mxn grid graph(1) / c
06.151113.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(1) / rb
06.151109.004.Number of partitions of n into fourth powers / rb
06.151109.003.Number of partitions of n into cubes / rb
06.151109.002.Number of partitions of n into squares / rb
06.151109.001.Number of palindromic and unimodal compositions of n / rb
06.151108.005.Polite number(5) / rb
06.151108.004.Polite number(4) / rb
06.151108.003.Polite number(3)
06.151108.002.Polite number(2) / rb
06.151108.001.約数の出力 / rb
06.151107.003.Polite number(1) / rb
06.151107.002.(-1)^k (n / k) の和 / rb
06.151107.001.n / k の和 / rb
06.151104.001.Kolakoski sequence(2) / rb
06.151103.002.Kolakoski sequence(1) / rb
06.151103.001.Gauss circle problem(4) / rb
06.151102.001.Gauss circle problem(3) / rb
06.151101.001.Gauss circle problem(2) / rb
06.151031.001.Alternating permutation / rb
06.151025.001.線対称に分割 / rb
06.151024.002.Number of times k is used in writing out all the numbers 0 through n(3)
06.151024.001.Number of times k is used in writing out all the numbers 0 through n(2) / rb
06.151023.001.Number of times k is used in writing out all the numbers 0 through n(1) / rb
06.151022.002.Number of times k is used in writing out all the numbers 1 through n(12)
06.151022.001.Number of times k is used in writing out all the numbers 1 through n(11) / rb
06.151021.001.Number of times k is used in writing out all the numbers 1 through n(10)
06.151020.001.Number of times k is used in writing out all the numbers 1 through n(9) / rb
06.151018.002.Number of times k is used in writing out all the numbers 1 through n(8) / rb
06.151018.001.Number of times k is used in writing out all the numbers 1 through n(7) / rb
06.151013.002.Number of times k is used in writing out all the numbers 1 through n(6) / rb
06.151013.001.Number of times k is used in writing out all the numbers 1 through n(5) / rb
06.151012.007.Number of times k is used in writing out all the numbers 1 through n(4) / rb
06.151012.006.Number of times k is used in writing out all the numbers 1 through n(3) / rb
06.151012.005.Number of times k is used in writing out all the numbers 1 through n(2) / rb
06.151012.004.Number of times k is used in writing out all the numbers 1 through n(1) / rb
06.151012.003.Number of times 1 is used in writing out all the numbers 1 through n(7) / rb
06.151012.002.Number of times 1 is used in writing out all the numbers 1 through n(6) / rb
06.151012.001.Number of times 1 is used in writing out all the numbers 1 through n(5) / rb
06.151011.005.Number of times 1 is used in writing out all the numbers 1 through n(4) / rb
06.151011.004.Number of times 1 is used in writing out all the numbers 1 through n(3) / rb
06.151011.003.Number of times 1 is used in writing out all the numbers 1 through n(2) / rb
06.151011.002.Number of times 1 is used in writing out all the numbers 1 through n(1) / rb
06.151011.001.整数零点 / rb
06.151004.004.素数が無数に存在すること(2) / rb
06.151004.003.素数が無数に存在すること(1) / rb
06.151004.002.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(2) / rb
06.151004.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(1) / rb
06.150929.001.オイラー関数のベキ(3) / rb
06.150927.002.オイラー関数のベキ(2) / rb
06.150927.001.k角数定理？ / rb
06.150924.001.オイラー関数のベキ(1) / rb
06.150922.002.フリーマン・ダイソンによるτ関数に関する公式 / rb
06.150922.001.Ulam spiral / rb
06.150921.003.階段状に現れるフィボナッチ数列 / rb
06.150921.002.縦読み、横読みの一般化 / rb
06.150921.001.Half-Catalan number / rb
06.150920.001.分割が絡んだ係数について / rb
06.150919.001.二重根号が外れてきれいになる式 / rb
06.150915.001.ラマヌジャンが見つけた等式 / rb
06.150914.002.xx + 27yy 型の素数 / rb
06.150914.001.Number of knight's tours on a m×n chessboard(3) / c
06.150913.001.Number of knight's tours on a m×n chessboard(2) / c
06.150912.001.Number of knight's tours on a m×n chessboard(1) / c
06.150910.002.コード用
06.150910.001.Number of knight's tours on a 3×k chessboard(2) / rb
06.150908.001.Number of knight's tours on a 3×k chessboard(1) / c
06.150904.001.桂馬飛び / rb
06.150903.001.p^n + s^n = q^n + r^n / rb
06.150902.001.p^5 + s^5 = q^5 + r^5 / rb
06.150830.003.p^4 + s^4 = q^4 + r^4 / rb
06.150830.002.アフィン暗号(2) / rb
06.150830.001.アフィン暗号(1) / rb
06.150829.001.ラマヌジャン予想(6)
06.150828.001.どの２つの和も平方数(4) / rb
06.150827.001.どの２つの和も平方数(3) / rb
06.150824.006.どの２つの和も立方数(16) / rb
06.150824.005.どの２つの和も立方数(15) / rb
06.150824.004.どの２つの和も立方数(14) / rb
06.150824.003.どの２つの和も立方数(13) / rb
06.150824.002.どの２つの和も立方数(12) / rb
06.150824.001.どの２つの和も立方数(11) / rb
06.150823.007.どの２つの和も立方数(10) / rb
06.150823.006.どの２つの和も立方数(9) / rb
06.150823.005.どの２つの和も立方数(8) / rb
06.150823.004.どの２つの和も立方数(7) / rb
06.150823.003.どの２つの和も立方数(6) / rb
06.150823.002.どの２つの和も立方数(5) / rb
06.150823.001.どの２つの和も立方数(4) / rb
06.150822.004.どの２つの和も立方数(3) / rb
06.150822.003.累乗数 / rb
06.150822.002.どの２つの和も立方数(2) / rb
06.150822.001.どの２つの和も立方数(1) / rb
06.150821.001.どの２つの和も平方数(2) / rb
06.150820.001.どの２つの和も平方数(1) / rb
06.150816.002.円周率 / rb
06.150816.001.高次元カタラン数 / rb
06.150815.001.隣り合う素数の差と積 / rb
06.150806.002.Number of n-digit right-truncatable primes / rb
06.150806.001.Right-truncatable prime / rb
06.150805.001.タウ函数の合同関係 / rb
06.150804.001.Pisano period / rb
06.150803.002.Almost Integer / rb
06.150803.001.4p - 1 型のヘーグナー数の性質 / rb
06.150802.001.ラマヌジャン予想(5) / py
06.150801.003.Ramanujan's tau function(3) / py
06.150801.002.ラマヌジャン予想(4) / rb
06.150801.001.
06.150731.002.
06.150731.001.ラマヌジャン予想(3) / rb
06.150730.001.ラマヌジャン予想(2) / rb
06.150728.002.ラマヌジャン予想(1) / rb
06.150728.001.Ramanujan's tau function(2) / rb
06.150727.003.Ramanujan's tau function(1) / rb
06.150727.002.Reverse and Add(2) / rb
06.150727.001.Reverse and Add(1) / rb
06.150726.005.回文数式 / rb
06.150726.004.Bell number / rb
06.150726.003.1 / n の性質について(1) / rb
06.150726.002.Primes of the form identical odd digits followed by a 1 / rb
06.150726.001.Prime numbers of the form 33…331 / rb
06.150720.003.Collatz conjecture(2) / rb
06.150720.002.Collatz conjecture(1) / rb
06.150720.001.隣接素数の和で表す表し方の数 / rb
06.150719.002.Aliquot sequence(2) / rb
06.150719.001.Aliquot sequence(1) / rb
06.150709.002.素数の個数(5) / rb
06.150709.001.素数の個数(4) / rb
06.150708.001.素数の個数(3) / rb
06.150707.003.素数の個数(2) / rb
06.150707.002.素数の個数(1) / rb
06.150707.001.素数の和 / rb
06.150706.001.Carmichael number / rb
06.150625.001.ROT13 と ROT47 / rb
06.150624.002.素数を順番につなぎ合わせた数について(4) / rb
06.150624.001.素数を順番につなぎ合わせた数について(3) / rb
06.150621.004.素数を順番につなぎ合わせた数について(2) / rb
06.150621.003.素数を順番につなぎ合わせた数について(1) / rb
06.150621.002.2, 3, 5, 7 を使った素数 / rb
06.150621.001.2^i + 3^i + 5^i + 7^i 型の素数 / rb
06.150620.002.i (1以上9以下)を含むならば、i が i 個含む数の個数について(2) / rb
06.150620.001.i (1以上9以下)を含むならば、i が i 個含む数の個数について(1) / rb
06.150613.002.双子素数と隣り合う双子素数の和 / rb
06.150613.001.隣り合う素数の和 / rb
06.150607.003.Look-and-say sequence / rb / RC
06.150607.002.Mian-Chowla sequence / rb
06.150607.001.各桁の和と自身との和について / rb
06.150603.001.塊の個数 / rb
06.150531.002.Gauss circle problem(1) / rb
06.150531.001.Ulam number / rb
06.150529.001.Toothpick Sequence / rb
06.150527.001.φの和 / rb
06.150525.001.Conway-Guy sequence / rb
06.150524.001.「普通の分数の足し算」と「日付の足し算」が一致する組合せ / rb
06.150523.001.2〜Nまでをある規則にしたがって並びかえる / rb
06.150517.001.ｎ進グレイコード ↔ ｎ進表記 / rb
06.150503.003.| σ(i + 1) - σ(1) | ≠ 1 を満たすσの個数 / rb
06.150503.002.3 6 9 2 5 8 1 4 7 (2) / rb
06.150503.001.Ducci sequence / rb
06.150502.001.3 6 9 2 5 8 1 4 7 (1) / rb
06.150429.001.p(n | 和因子は相異なる) / rb
06.150425.002.p(n | 和因子は奇数) / rb
06.150425.001.Taxi-cab numbers: sums of 2 cubes in more than 1 way / rb
06.150422.001.カプレカ数 / rb
06.150419.001.864197532（高速化） / rb
06.150418.002.864197532 / rb
06.150418.001.Lucas、Perrin そして McIrvin（剰余について） / rb
06.150414.001.Lucas、Perrin そして McIrvin / rb
06.150413.002.Thue–Morse sequence / rb
06.150413.001.Schizophrenic number（連続する個数 2.0） / rb
06.150412.001.Schizophrenic number（連続する個数 1.0） / rb
06.150410.001.Schizophrenic number / rb
06.150405.003.Generalization of the Zeckendorf representation / rb
06.150405.002.Zeckendorf number representation / rb / RC
06.150405.001.Self-descriptive number / rb
06.150330.001.Heterosquare / rb
06.150329.004.Connell Sequence / rb
06.150329.003.21397 / rb
06.150329.002.Göbel's Sequence / rb
06.150329.001.Somos-k sequence / rb
06.150328.001.Perrin Pseudoprime / rb
06.150323.001.
06.150315.001.不思議数 / rb
06.150301.002.
06.150301.001.Silverman's Sequence / rb
06.150225.001.Square-free integer / rb
06.150224.002.Cyclic number / rb
06.150224.001.
06.150111.001.バイナリサーチ / rb
06.150110.004.リニアサーチ / rb
06.150110.003.マージソート / rb
06.150110.002.クイックソート / rb
06.150110.001.バブルソート / rb
06.150104.002.「n-クイーン」パズル / rb
06.150104.001.ナップザック問題 / rb
06.141027.001.Partition / py
06.140927.002.Lucky prime / rb
06.140927.001.Lucky number / rb
06.140831.001.Partition（高速化） / rb
06.140823.004.Prime Partition / rb
06.140823.003.Partition / rb
06.140823.002.
06.140823.001.
06.140813.001.最大増加部分列 / rb
06.140316.001.548834 / rb
06.140306.001.覆面算（SEND + MORE = MONEY） / rb
02.150822.001.連続する自然数の積は平方数ではない
02.130120.002.On the Inequality with Power-Exponential Function
02.130120.001.
09.160131.001.この記事
09.160101.001.
09.151129.001.
09.151108.001.
09.151031.001.
09.151012.001.
09.150927.001.
09.150913.001.
09.150829.001.
09.150827.001.
09.150822.001.
09.150815.001.
09.150801.001.
09.150727.001.
09.150720.001.
09.150706.001.
09.150607.001.
09.150531.001.
09.150529.001.
09.150525.001.
09.150503.001.
09.150418.001.
09.150412.001.
09.150405.001.
09.150330.001.
09.150329.001.
rb Ruby
py Python
RC Rosetta Codeにもコードあり
08.150308.001.Clock sequence / rb
06.160130.001.引き算魔方陣 / rb
06.160128.001.誤っているようで誤っていない数式 / rb
06.160126.001.「和の２乗 = ３乗の和」となる組合せ(4) / rb
06.160124.001.「和の２乗 = ３乗の和」となる組合せ(3) / rb
06.160123.002.「和の２乗 = ３乗の和」となる組合せ(2)
06.160123.001.「和の２乗 = ３乗の和」となる組合せ(1) / rb
06.160117.002.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(3) / rb
06.160117.001.Lander, Parkin, and Selfridge conjecture / rb
06.160114.001.√5 の近似値の連分数展開(2) / rb
06.160113.001.√5 の近似値の連分数展開(1) / rb
06.160112.002.n と互いに素なn 未満の自然数の和 / rb
06.160112.001.単位分数の和が1 / 2(3) / rb
06.160111.003.単位分数の和が1 / 2(2) / rb
06.160111.002.単位分数の和が1 / 2(1) / rb
06.160111.001.逆数をとり、単位分数を加えていく数列 / rb
06.160109.006.9 × (10^(18n) - 1) / 19 の性質について(5) / rb
06.160109.005.9 × (10^(18n) - 1) / 19 の性質について(4) / rb
06.160109.004.9 × (10^(18n) - 1) / 19 の性質について(3) / rb
06.160109.003.9 × (10^(18n) - 1) / 19 の性質について(2) / rb
06.160109.002.9 × (10^(18n) - 1) / 19 の性質について(1) / rb
06.160109.001.19 / 89 … 91 の性質について / rb
06.160108.002.1 / n の性質について(3) / rb
06.160108.001.1 / n の性質について(2) / rb
06.160106.003.異なる単位分数（< 1）の和が1 より大きい自然数(2) / rb
06.160106.002.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(2) / rb
06.160106.001.Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n(1) / rb
06.160105.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(3) / rb
06.160104.002.Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,....,n,n,n} with no two consecutive terms equal / rb
06.160104.001.異なる単位分数（< 1）の和が1 より大きい自然数(1) / rb
06.160103.006.Arrangement of the word 'Success' / rb
06.160103.005.注意書き / rb
06.160103.004.A190945(100)(4) / rb
06.160103.003.A190945(100)(3) / rb
06.160103.002.A190945(100)(2) / rb
06.160103.001.A190945(100)(1)
06.160101.002.p(pn | 和因子は素数)(3) / rb
06.160101.001.Riffle Shuffle / rb
06.151231.007.Numbers that are not the sum of distinct pentagonal numbers / rb
06.151231.006.Numbers that are not the sum of distinct squares / rb
06.151231.005.Numbers that are not the sum of distinct triangular numbers / rb
06.151231.004.12桁の数字
06.151231.003.p(n^4 | 和因子は四乗数) / rb
06.151231.002.p(n^3 | 和因子は立方数) / rb
06.151231.001.p(n^2 | 和因子は平方数) / rb
06.151230.004.p(pn | 和因子は素数)(2) / rb
06.151230.003.p(pn | 和因子は素数)(1) / rb
06.151230.002.p(Fn | 和因子はフィボナッチ数)(2) / rb
06.151230.001.p(Fn | 和因子はフィボナッチ数)(1) / rb
06.151228.002.p(n | 和因子はフィボナッチ数)(2) / rb
06.151228.001.p(n | 和因子はフィボナッチ数)(1) / rb
06.151227.009.Stern's diatomic series に現れるフィボナッチ数(2) / rb
06.151227.008.Stern's diatomic series に現れるフィボナッチ数(1) / rb
06.151227.007.Stern's diatomic series(4) / rb
06.151227.006.Stern's diatomic series(3) / rb
06.151227.005.Stern's diatomic series(2) / rb
06.151227.004.Stern's diatomic series(1) / rb
06.151227.003.Calkin–Wilf sequence / rb
06.151227.002.離散力学系における軌道の計算(2) / rb
06.151227.001.離散力学系における軌道の計算(1) / rb
06.151226.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(2) / rb
06.151224.002.Topswops(3) / rb
06.151224.001.Topswops(2) / rb
06.151223.004.Topswops(1) / rb
06.151223.003.郵便切手の問題(3) / rb
06.151223.002.郵便切手の問題(2) / rb
06.151223.001.n! を2^(n - k) で割ると整数か？ / rb
06.151220.003.郵便切手の問題(1) / rb
06.151220.002.連続する整数をkずらすこと
06.151220.001.Josephus problem / rb
06.151219.007.Frobenius number for k consecutive numbers(2) / rb
06.151219.006.Frobenius number for k consecutive numbers(1) / rb
06.151219.005.Frobeniusの硬貨交換問題(5) / rb
06.151219.004.Frobeniusの硬貨交換問題(4) / rb
06.151219.003.Frobeniusの硬貨交換問題(3) / rb
06.151219.002.Frobeniusの硬貨交換問題(2) / rb
06.151219.001.Frobeniusの硬貨交換問題(1) / rb
06.151217.001.周期性をもつ差分方程式 / rb
06.151214.002.Euler brick(2) / rb
06.151214.001.Euler brick(1) / rb
06.151213.004.原始ピタゴラス数の和(2) / rb
06.151213.003.原始ピタゴラス数の和(1) / rb
06.151213.002.Odd primes p such that Pi_{3,1}(p) = Pi_{3,2}(p) - 1 / rb
06.151213.001.Pythagorean prime / rb
06.151212.005.Hilbert prime(3) / rb
06.151212.004.Hilbert prime(2) / rb
06.151212.003.Hilbert prime(1) / rb
06.151212.002.Chebyshev's bias(2) / rb
06.151212.001.Chebyshev's bias(1) / rb
06.151211.001.mapしてflattenすることと flat_map との違い / rb
06.151210.003.Number of partitions of n that do not contain 1 as a part(2) / rb
06.151210.002.Number of partitions of n that do not contain 1 as a part(1) / rb
06.151210.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(2) / rb
06.151209.001.Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n(1) / rb
06.151208.001.分割の逆数和が1 / rb
06.151206.001.フィボナッチ数列、トリボナッチ数列、テトラナッチ数列、…(1) / rb
06.151202.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(2) / rb
06.151129.004.break と exit の違い / rb
06.151129.003.puts と ハッシュ / rb
06.151129.002.正方形の形をした領域内のSelf-avoiding walk(3) / rb
06.151129.001.二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151128.004.正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.003.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(2) / rb
06.151128.002.（辺が斜めの）正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151128.001.正方形の形をした領域内のSelf-avoiding walk(1) / rb
06.151127.001.二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151125.002.二等辺三角形の形をした領域内のSelf-avoiding walk(2) / rb
06.151125.001.二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151124.001.Dyck path とSelf-avoiding walk の融合(7) / rb
06.151123.006.Dyck path とSelf-avoiding walk の融合(6) / c
06.151123.005.Dyck path とSelf-avoiding walk の融合(5) / c
06.151123.004.Dyck path とSelf-avoiding walk の融合(4) / rb
06.151123.003.Dyck path とSelf-avoiding walk の融合(3) / rb
06.151123.002.Dyck path とSelf-avoiding walk の融合(2) / rb
06.151123.001.Dyck path とSelf-avoiding walk の融合(1) / rb
06.151122.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(4) / rb
06.151122.002.直角二等辺三角形の形をした領域内のSelf-avoiding walk(3) / rb
06.151122.001.直角二等辺三角形の形をした領域内のSelf-avoiding walk(2) / c
06.151121.003.直角二等辺三角形の形をした領域内のSelf-avoiding walk(1) / rb
06.151121.002.Self-avoiding walk(6) / rb
06.151121.001.Self-avoiding walk(5) / c
06.151118.002.Self-avoiding walk(4) / c
06.151118.001.Self-avoiding walk(3) / c
06.151117.002.Self-avoiding walk(2) / c
06.151117.001.Self-avoiding walk(1) / c
06.151116.001.Number of weakly unimodal partitions of n(2) / rb
06.151115.002.Number of weakly unimodal partitions of n(1) / rb
06.151115.001.Dixon's identity / rb
06.151114.002.Number of directed Hamiltonian paths in mxn grid graph(2) / c
06.151114.001.Number of directed Hamiltonian paths in mxn grid graph(1) / c
06.151113.001.Number of smooth weakly unimodal compositions of n into positive parts such that the first and last part are 1(1) / rb
06.151109.004.Number of partitions of n into fourth powers / rb
06.151109.003.Number of partitions of n into cubes / rb
06.151109.002.Number of partitions of n into squares / rb
06.151109.001.Number of palindromic and unimodal compositions of n / rb
06.151108.005.Polite number(5) / rb
06.151108.004.Polite number(4) / rb
06.151108.003.Polite number(3)
06.151108.002.Polite number(2) / rb
06.151108.001.約数の出力 / rb
06.151107.003.Polite number(1) / rb
06.151107.002.(-1)^k (n / k) の和 / rb
06.151107.001.n / k の和 / rb
06.151104.001.Kolakoski sequence(2) / rb
06.151103.002.Kolakoski sequence(1) / rb
06.151103.001.Gauss circle problem(4) / rb
06.151102.001.Gauss circle problem(3) / rb
06.151101.001.Gauss circle problem(2) / rb
06.151031.001.Alternating permutation / rb
06.151025.001.線対称に分割 / rb
06.151024.002.Number of times k is used in writing out all the numbers 0 through n(3)
06.151024.001.Number of times k is used in writing out all the numbers 0 through n(2) / rb
06.151023.001.Number of times k is used in writing out all the numbers 0 through n(1) / rb
06.151022.002.Number of times k is used in writing out all the numbers 1 through n(12)
06.151022.001.Number of times k is used in writing out all the numbers 1 through n(11) / rb
06.151021.001.Number of times k is used in writing out all the numbers 1 through n(10)
06.151020.001.Number of times k is used in writing out all the numbers 1 through n(9) / rb
06.151018.002.Number of times k is used in writing out all the numbers 1 through n(8) / rb
06.151018.001.Number of times k is used in writing out all the numbers 1 through n(7) / rb
06.151013.002.Number of times k is used in writing out all the numbers 1 through n(6) / rb
06.151013.001.Number of times k is used in writing out all the numbers 1 through n(5) / rb
06.151012.007.Number of times k is used in writing out all the numbers 1 through n(4) / rb
06.151012.006.Number of times k is used in writing out all the numbers 1 through n(3) / rb
06.151012.005.Number of times k is used in writing out all the numbers 1 through n(2) / rb
06.151012.004.Number of times k is used in writing out all the numbers 1 through n(1) / rb
06.151012.003.Number of times 1 is used in writing out all the numbers 1 through n(7) / rb
06.151012.002.Number of times 1 is used in writing out all the numbers 1 through n(6) / rb
06.151012.001.Number of times 1 is used in writing out all the numbers 1 through n(5) / rb
06.151011.005.Number of times 1 is used in writing out all the numbers 1 through n(4) / rb
06.151011.004.Number of times 1 is used in writing out all the numbers 1 through n(3) / rb
06.151011.003.Number of times 1 is used in writing out all the numbers 1 through n(2) / rb
06.151011.002.Number of times 1 is used in writing out all the numbers 1 through n(1) / rb
06.151011.001.整数零点 / rb
06.151004.004.素数が無数に存在すること(2) / rb
06.151004.003.素数が無数に存在すること(1) / rb
06.151004.002.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(2) / rb
06.151004.001.Number of permutations of the multiset {1,1,2,2,....,n,n} with no two consecutive terms equal(1) / rb
06.150929.001.オイラー関数のベキ(3) / rb
06.150927.002.オイラー関数のベキ(2) / rb
06.150927.001.k角数定理？ / rb
06.150924.001.オイラー関数のベキ(1) / rb
06.150922.002.フリーマン・ダイソンによるτ関数に関する公式 / rb
06.150922.001.Ulam spiral / rb
06.150921.003.階段状に現れるフィボナッチ数列 / rb
06.150921.002.縦読み、横読みの一般化 / rb
06.150921.001.Half-Catalan number / rb
06.150920.001.分割が絡んだ係数について / rb
06.150919.001.二重根号が外れてきれいになる式 / rb
06.150915.001.ラマヌジャンが見つけた等式 / rb
06.150914.002.xx + 27yy 型の素数 / rb
06.150914.001.Number of knight's tours on a m×n chessboard(3) / c
06.150913.001.Number of knight's tours on a m×n chessboard(2) / c
06.150912.001.Number of knight's tours on a m×n chessboard(1) / c
06.150910.002.コード用
06.150910.001.Number of knight's tours on a 3×k chessboard(2) / rb
06.150908.001.Number of knight's tours on a 3×k chessboard(1) / c
06.150904.001.桂馬飛び / rb
06.150903.001.p^n + s^n = q^n + r^n / rb
06.150902.001.p^5 + s^5 = q^5 + r^5 / rb
06.150830.003.p^4 + s^4 = q^4 + r^4 / rb
06.150830.002.アフィン暗号(2) / rb
06.150830.001.アフィン暗号(1) / rb
06.150829.001.ラマヌジャン予想(6)
06.150828.001.どの２つの和も平方数(4) / rb
06.150827.001.どの２つの和も平方数(3) / rb
06.150824.006.どの２つの和も立方数(16) / rb
06.150824.005.どの２つの和も立方数(15) / rb
06.150824.004.どの２つの和も立方数(14) / rb
06.150824.003.どの２つの和も立方数(13) / rb
06.150824.002.どの２つの和も立方数(12) / rb
06.150824.001.どの２つの和も立方数(11) / rb
06.150823.007.どの２つの和も立方数(10) / rb
06.150823.006.どの２つの和も立方数(9) / rb
06.150823.005.どの２つの和も立方数(8) / rb
06.150823.004.どの２つの和も立方数(7) / rb
06.150823.003.どの２つの和も立方数(6) / rb
06.150823.002.どの２つの和も立方数(5) / rb
06.150823.001.どの２つの和も立方数(4) / rb
06.150822.004.どの２つの和も立方数(3) / rb
06.150822.003.累乗数 / rb
06.150822.002.どの２つの和も立方数(2) / rb
06.150822.001.どの２つの和も立方数(1) / rb
06.150821.001.どの２つの和も平方数(2) / rb
06.150820.001.どの２つの和も平方数(1) / rb
06.150816.002.円周率 / rb
06.150816.001.高次元カタラン数 / rb
06.150815.001.隣り合う素数の差と積 / rb
06.150806.002.Number of n-digit right-truncatable primes / rb
06.150806.001.Right-truncatable prime / rb
06.150805.001.タウ函数の合同関係 / rb
06.150804.001.Pisano period / rb
06.150803.002.Almost Integer / rb
06.150803.001.4p - 1 型のヘーグナー数の性質 / rb
06.150802.001.ラマヌジャン予想(5) / py
06.150801.003.Ramanujan's tau function(3) / py
06.150801.002.ラマヌジャン予想(4) / rb
06.150801.001.
06.150731.002.
06.150731.001.ラマヌジャン予想(3) / rb
06.150730.001.ラマヌジャン予想(2) / rb
06.150728.002.ラマヌジャン予想(1) / rb
06.150728.001.Ramanujan's tau function(2) / rb
06.150727.003.Ramanujan's tau function(1) / rb
06.150727.002.Reverse and Add(2) / rb
06.150727.001.Reverse and Add(1) / rb
06.150726.005.回文数式 / rb
06.150726.004.Bell number / rb
06.150726.003.1 / n の性質について(1) / rb
06.150726.002.Primes of the form identical odd digits followed by a 1 / rb
06.150726.001.Prime numbers of the form 33…331 / rb
06.150720.003.Collatz conjecture(2) / rb
06.150720.002.Collatz conjecture(1) / rb
06.150720.001.隣接素数の和で表す表し方の数 / rb
06.150719.002.Aliquot sequence(2) / rb
06.150719.001.Aliquot sequence(1) / rb
06.150709.002.素数の個数(5) / rb
06.150709.001.素数の個数(4) / rb
06.150708.001.素数の個数(3) / rb
06.150707.003.素数の個数(2) / rb
06.150707.002.素数の個数(1) / rb
06.150707.001.素数の和 / rb
06.150706.001.Carmichael number / rb
06.150625.001.ROT13 と ROT47 / rb
06.150624.002.素数を順番につなぎ合わせた数について(4) / rb
06.150624.001.素数を順番につなぎ合わせた数について(3) / rb
06.150621.004.素数を順番につなぎ合わせた数について(2) / rb
06.150621.003.素数を順番につなぎ合わせた数について(1) / rb
06.150621.002.2, 3, 5, 7 を使った素数 / rb
06.150621.001.2^i + 3^i + 5^i + 7^i 型の素数 / rb
06.150620.002.i (1以上9以下)を含むならば、i が i 個含む数の個数について(2) / rb
06.150620.001.i (1以上9以下)を含むならば、i が i 個含む数の個数について(1) / rb
06.150613.002.双子素数と隣り合う双子素数の和 / rb
06.150613.001.隣り合う素数の和 / rb
06.150607.003.Look-and-say sequence / rb / RC
06.150607.002.Mian-Chowla sequence / rb
06.150607.001.各桁の和と自身との和について / rb
06.150603.001.塊の個数 / rb
06.150531.002.Gauss circle problem(1) / rb
06.150531.001.Ulam number / rb
06.150529.001.Toothpick Sequence / rb
06.150527.001.φの和 / rb
06.150525.001.Conway-Guy sequence / rb
06.150524.001.「普通の分数の足し算」と「日付の足し算」が一致する組合せ / rb
06.150523.001.2〜Nまでをある規則にしたがって並びかえる / rb
06.150517.001.ｎ進グレイコード ↔ ｎ進表記 / rb
06.150503.003.| σ(i + 1) - σ(1) | ≠ 1 を満たすσの個数 / rb
06.150503.002.3 6 9 2 5 8 1 4 7 (2) / rb
06.150503.001.Ducci sequence / rb
06.150502.001.3 6 9 2 5 8 1 4 7 (1) / rb
06.150429.001.p(n | 和因子は相異なる) / rb
06.150425.002.p(n | 和因子は奇数) / rb
06.150425.001.Taxi-cab numbers: sums of 2 cubes in more than 1 way / rb
06.150422.001.カプレカ数 / rb
06.150419.001.864197532（高速化） / rb
06.150418.002.864197532 / rb
06.150418.001.Lucas、Perrin そして McIrvin（剰余について） / rb
06.150414.001.Lucas、Perrin そして McIrvin / rb
06.150413.002.Thue–Morse sequence / rb
06.150413.001.Schizophrenic number（連続する個数 2.0） / rb
06.150412.001.Schizophrenic number（連続する個数 1.0） / rb
06.150410.001.Schizophrenic number / rb
06.150405.003.Generalization of the Zeckendorf representation / rb
06.150405.002.Zeckendorf number representation / rb / RC
06.150405.001.Self-descriptive number / rb
06.150330.001.Heterosquare / rb
06.150329.004.Connell Sequence / rb
06.150329.003.21397 / rb
06.150329.002.Göbel's Sequence / rb
06.150329.001.Somos-k sequence / rb
06.150328.001.Perrin Pseudoprime / rb
06.150323.001.
06.150315.001.不思議数 / rb
06.150301.002.
06.150301.001.Silverman's Sequence / rb
06.150225.001.Square-free integer / rb
06.150224.002.Cyclic number / rb
06.150224.001.
06.150111.001.バイナリサーチ / rb
06.150110.004.リニアサーチ / rb
06.150110.003.マージソート / rb
06.150110.002.クイックソート / rb
06.150110.001.バブルソート / rb
06.150104.002.「n-クイーン」パズル / rb
06.150104.001.ナップザック問題 / rb
06.141027.001.Partition / py
06.140927.002.Lucky prime / rb
06.140927.001.Lucky number / rb
06.140831.001.Partition（高速化） / rb
06.140823.004.Prime Partition / rb
06.140823.003.Partition / rb
06.140823.002.
06.140823.001.
06.140813.001.最大増加部分列 / rb
06.140316.001.548834 / rb
06.140306.001.覆面算（SEND + MORE = MONEY） / rb
02.150822.001.連続する自然数の積は平方数ではない
02.130120.002.On the Inequality with Power-Exponential Function
02.130120.001.
09.160131.001.この記事
09.160101.001.
09.151129.001.
09.151108.001.
09.151031.001.
09.151012.001.
09.150927.001.
09.150913.001.
09.150829.001.
09.150827.001.
09.150822.001.
09.150815.001.
09.150801.001.
09.150727.001.
09.150720.001.
09.150706.001.
09.150607.001.
09.150531.001.
09.150529.001.
09.150525.001.
09.150503.001.
09.150418.001.
09.150412.001.
09.150405.001.
09.150330.001.
09.150329.001.
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