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

Terms

a(0) =1a(1) =1a(2) =3a(3) =10a(4) =41a(5) =196a(6) =1057a(7) =6322a(8) =41393a(9) =293608a(10) =2237921a(11) =18210094a(12) =157329097a(13) =1436630092a(14) =13810863809a(15) =139305550066