41440

Appears in sequences

• Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (4,k)-perfect numbers.at n=54A019293
• Theta series of odd 8-dimensional 5-modular lattice O(5).at n=42A029719
• Number of directed Hamiltonian paths on the n-antiprism graph.at n=5A124352
• Triangle T(n,m) read by rows: the number of series-parallel networks with n+2 vertices and m+n+1 edges.at n=18A181320
• Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north or southwest neighbor modulo 3 and the upper left element equal to 0.at n=7A266862
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to or 1 greater than any north or southwest neighbors modulo n and the upper left element equal to 0.at n=47A267655