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

Terms

a(0) =1a(1) =0a(2) =0a(3) =3a(4) =6a(5) =10a(6) =195a(7) =1281a(8) =5908a(9) =68076a(10) =758565a(11) =6486535a(12) =75598446a(13) =1059484218a(14) =13378016743a(15) =185273328345