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

Terms

a(0) =0a(1) =0a(2) =2a(3) =6a(4) =24a(5) =140a(6) =990a(7) =8442a(8) =84056a(9) =955656a(10) =12227130a(11) =173812430a(12) =2717859012a(13) =46362339036a(14) =856770362630