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

Terms

a(0) =1a(1) =1a(2) =3a(3) =7a(4) =37a(5) =141a(6) =1111a(7) =5923a(8) =62217a(9) =426457a(10) =5599531a(11) =46910271a(12) =739138093a(13) =7318002277a(14) =134523132927