E.g.f.: exp(-x^4 * exp(x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-24a(5) =-120a(6) =-360a(7) =-840a(8) =18480a(9) =359856a(10) =3623760a(11) =26603280a(12) =79821720a(13) =-2283258120a(14) =-61509151704a(15) =-964150419960