Expansion of e.g.f. exp(x^3 * exp(x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =6a(4) =24a(5) =60a(6) =480a(7) =5250a(8) =40656a(9) =302904a(10) =3024720a(11) =35260830a(12) =400499880a(13) =4619610996a(14) =58758862344a(15) =813678468330