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

Terms

a(0) =1a(1) =1a(2) =0a(3) =-6a(4) =-36a(5) =-120a(6) =240a(7) =8400a(8) =82320a(9) =362880a(10) =-3507840a(11) =-103783680a(12) =-1268688960a(13) =-4843238400a(14) =175429013760