Expansion of e.g.f. exp(x^4/(1 - x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =60480a(9) =725760a(10) =9072000a(11) =119750400a(12) =1756339200a(13) =28021593600a(14) =479480601600