Expansion of e.g.f.: exp(x + 4*x^2).

Terms

a(0) =1a(1) =1a(2) =9a(3) =25a(4) =241a(5) =1041a(6) =10681a(7) =60649a(8) =658785a(9) =4540321a(10) =51972841a(11) =415198521a(12) =4988808529a(13) =44847866545a(14) =563683953561