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

Terms

a(0) =1a(1) =-1a(2) =0a(3) =3a(4) =-4a(5) =-25a(6) =114a(7) =287a(8) =-4152a(9) =1647a(10) =192230a(11) =-807961a(12) =-10164804a(13) =111209111a(14) =454840554a(15) =-14657978385a(16) =21202175504