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

Terms

a(0) =1a(1) =1a(2) =1a(3) =13a(4) =49a(5) =481a(6) =3841a(7) =38221a(8) =464353a(9) =5368609a(10) =82042561a(11) =1151767981a(12) =20242097041a(13) =342921513793