51997

Appears in sequences

• A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the pair of ratios 6/5 and 5/3 which generate two complementary musical harmonies, the Minor 3rd (6/5) and the Major 6th (5/3).at n=30A061919
• a(n) = Sum_{k=0..floor(n/2)} binomial(n-k, k-1)*4^(n-k-1)*(5/4)^k.at n=7A099622
• Composite squarefree numbers n such that p(i)-3 divides n+3, where p(i) are the prime factors of n.at n=7A225703
• Number of ordered unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 6.at n=23A244535
• Number of unlabeled loopless multigraphs with n edges covering four vertices.at n=39A328652
• Denominators of the best rational approximations of log(6/5)/log(2).at n=28A328883