E.g.f. satisfies A(x) = exp(x * (1 + x)/A(x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =-2a(4) =9a(5) =-44a(6) =175a(7) =246a(8) =-21007a(9) =396712a(10) =-5576769a(11) =57840850a(12) =-151112951a(13) =-14137899060a(14) =539212013327