75460

Appears in sequences

• a(n) = n*(n-1)^3*(n^2-n-1)/2.at n=8A101384
• Triangle read by rows: T(n, m) = number of painted forests on labeled vertex set [n] with m trees. Also number of painted forests with exactly n - m edges.at n=31A106834
• Numbers k such that phi(k)*sigma(k) is a cube.at n=26A114077
• a(n) = binomial(n+9, 9)*7^n.at n=3A197192
• Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(k^3).at n=27A343323