Expansion of e.g.f. (1 + x + x^2)^(x^3).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =24a(5) =60a(6) =-480a(7) =1260a(8) =28224a(9) =60480a(10) =-1447200a(11) =1663200a(12) =235509120a(13) =-311351040a(14) =-21211968960a(15) =149707958400