E.g.f.: exp(-(x + x^2 + x^3)).

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-1a(4) =25a(5) =19a(6) =-209a(7) =-2269a(8) =2801a(9) =68615a(10) =371071a(11) =-2499641a(12) =-28306871a(13) =-58645861a(14) =1964456495a(15) =15133179179a(16) =-37119981599