Expansion of e.g.f. exp(-x * (exp(2*x) + 1)).

Terms

a(0) =1a(1) =-2a(2) =0a(3) =4a(4) =32a(5) =48a(6) =-608a(7) =-6400a(8) =-24064a(9) =163072a(10) =3567104a(11) =28394496a(12) =6535168a(13) =-3250745344a(14) =-50725740544a(15) =-344530853888