Expansion of e.g.f. (1+x) * exp(x*(1+x)^2).

Terms

a(0) =1a(1) =2a(2) =7a(3) =34a(4) =173a(5) =1066a(6) =7147a(7) =51962a(8) =412729a(9) =3478258a(10) =31220111a(11) =296409202a(12) =2953487077a(13) =30870965594a(14) =336796018483