E.g.f. satisfies A(x) = exp(x) * (1 + x * A(x)^2)^2.

A377746

E.g.f. satisfies A(x) = exp(x) * (1 + x * A(x)^2)^2.

Terms

    a(0) =1a(1) =3a(2) =31a(3) =637a(4) =19813a(5) =830671a(6) =43938067a(7) =2809979257a(8) =210946285417

External references