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

Terms

a(0) =1a(1) =0a(2) =1a(3) =6a(4) =39a(5) =300a(6) =2715a(7) =28350a(8) =335265a(9) =4422600a(10) =64298745a(11) =1020477150a(12) =17542820295a(13) =324552648420