Expansion of e.g.f. exp(1 - (1+x)^4).

Terms

a(0) =1a(1) =-4a(2) =4a(3) =56a(4) =-104a(5) =-2464a(6) =1696a(7) =181184a(8) =462016a(9) =-17069824a(10) =-141580544a(11) =1593913856a(12) =33015560704a(13) =-47193585664