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

Terms

a(0) =1a(1) =-3a(2) =8a(3) =-17a(4) =20a(5) =23a(6) =-50a(7) =-1185a(8) =6648a(9) =20143a(10) =-372646a(11) =179111a(12) =25378468a(13) =-126050121a(14) =-1849977930a(15) =23353880527a(16) =109161798512