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

Terms

a(0) =1a(1) =0a(2) =2a(3) =6a(4) =36a(5) =260a(6) =2190a(7) =21882a(8) =248696a(9) =3181320a(10) =45229050a(11) =707208590a(12) =12063902532a(13) =222939837276