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

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =-5a(5) =-10a(6) =16a(7) =154a(8) =365a(9) =-750a(10) =-9749a(11) =-35222a(12) =20956a(13) =1013220a(14) =6007821a(15) =10272092a(16) =-129948837a(17) =-1405396426a(18) =-6318145964a(19) =7407235766a(20) =371429230721