69413

Appears in sequences

• A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to four of the simple ratios of musical harmony: 5/4, 4/3, 3/2 and 8/5.at n=29A060525
• A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the 7 pairs of complementary target ratios needed to express the 12 unsymmetrical steps of the untempered (Just Intonation) scale known as the Duodene: 3/2 and 4/3, 5/4 and 8/5, 6/5 and 5/3, 9/8 and 16/9, 10/9 and 9/5, 16/15 and 15/8 and 45/32 and 64/45.at n=38A061920
• A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the 11 pairs of target ratios needed to express the 22 steps of the theoretical Hindu scale known as the 22 Srutis: 45/32 and 64/45, 27/20 and 40/27, 4/3 and 3/2, 81/64 and 128/81, 5/4 and 8/5, 6/5 and 5/3, 32/27 and 27/16, 9/8 and 16/9, 10/9 and 9/5, 16/15 and 15/8, 256/243 and 243/128.at n=49A061921
• Number of triangular partitions of n of order 3.at n=45A084439
• Row sums of triangle A092689, which is related to the central trinomial coefficients (A002426).at n=10A092690
• Binomial transform of [1, 4, 10, 20, 0, 0, 0, ...].at n=28A143131
• Composite numbers n such that the distinct digits in n and the distinct digits in the proper divisors of n are the same.at n=29A237713
• Growth series for affine Coxeter group (or affine Weyl group) D_4.at n=46A266759
• Numbers k such that the set of all the decimal digits of k is the same as the set of all the decimal digits of the proper divisors of k.at n=30A282755
• Expansion of 1/(1 - Sum_{k>=1} x^prime(k)/(1 - x^prime(k))).at n=25A300671
• Number of vertices of even degree in a cubic lattice n X n X n.at n=42A383585