a(n) = n! * [x^n] (1 + x)^exp(n*x).

A308333

a(n) = n! * [x^n] (1 + x)^exp(n*x).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =36a(4) =528a(5) =11675a(6) =359640a(7) =14519337a(8) =736902656a(9) =45751463361

External references