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

Terms

a(0) =1a(1) =1a(2) =3a(3) =9a(4) =39a(5) =195a(6) =1185a(7) =8295a(8) =66465a(9) =598185a(10) =5982795a(11) =65810745a(12) =789739335a(13) =10266611355a(14) =143732694105