56853

Appears in sequences

• Expansion of e.g.f. arcsin(log(x+1) - sinh(x)).at n=9A013259
• Expansion of e.g.f. sinh(log(x+1) - sinh(x)).at n=9A013263
• Composite numbers n such that the sum of divisors of n, sigma(n), divided by the number of divisors, d(n) and sigma(n) minus n are both rational squares.at n=12A049226
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-0100 pattern in any orientation.at n=10A146641
• Number of n X 3 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.at n=20A266930
• Number of 3 X 3 matrices with unit determinant and positive integer entries whose sum is n.at n=33A361082