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

Terms

a(0) =1a(1) =0a(2) =0a(3) =6a(4) =12a(5) =40a(6) =540a(7) =3528a(8) =25200a(9) =263520a(10) =2741760a(11) =30048480a(12) =372794400a(13) =4971957120a(14) =70612686144