8544965

Appears in sequences

• Number of nonequivalent dissections of a polygon into n pentagons by nonintersecting diagonals rooted at a cell up to rotation.at n=9A005037
• a(n) = floor( binomial(n,8)/9).at n=40A011845
• Group the natural numbers such that the product of the terms of the n-th group is divisible by n!: (1), (2), (3, 4), (5, 6, 7, 8), (9, 10, 11, 12), (13, 14, 15, 16, 17, 18), (19, 20, 21, 22, 23, 24), ... Sequence contains the product of the terms of the n-th group divided by n!. a(n) = A085912(n)/(n!).at n=8A085915
• a(n) = (10 / ((3*n+1)*(3*n+2))) * binomial(4*n, n).at n=10A197271
• Leading diagonal of triangle in A222310.at n=39A222311
• Number of aperiodic necklaces (Lyndon words) with 9 black beads and n white beads.at n=32A263318
• Number of subsets of 9 integers between 1 and n such that their sum is 3 modulo n.at n=31A381351