a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * k^3 * a(n-k).
A337591
a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * k^3 * a(n-k).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =51a(4) =760a(5) =15545a(6) =428256a(7) =15043483a(8) =653049664a(9) =34204348305
External references
- oeis: A337591