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

Terms

a(0) =0a(1) =0a(2) =0a(3) =6a(4) =12a(5) =20a(6) =390a(7) =2562a(8) =11816a(9) =166392a(10) =1970730a(11) =17131070a(12) =241009692a(13) =3861669396a(14) =51411143966a(15) =828234487290