Expansion of e.g.f. 1/(exp(x) - x^3).

Terms

a(0) =1a(1) =-1a(2) =1a(3) =5a(4) =-47a(5) =239a(6) =-239a(7) =-11761a(8) =170689a(9) =-1237825a(10) =-2360159a(11) =238756319a(12) =-4146035519a(13) =32586126143a(14) =359988680689