Expansion of e.g.f. exp(x * (1+x)^4).

Terms

a(0) =1a(1) =1a(2) =9a(3) =61a(4) =481a(5) =4881a(6) =55321a(7) =682669a(8) =9343041a(9) =139078081a(10) =2216425321a(11) =37736834301a(12) =683184324769