Inverse Weigh transform of (-1)^n * n!.

Terms

a(0) =-1a(1) =1a(2) =-4a(3) =18a(4) =-92a(5) =572a(6) =-4156a(7) =34177a(8) =-314368a(9) =3199844a(10) =-35703996a(11) =433422067a(12) =-5687955724a(13) =80256874912