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

A377745

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

Terms

    a(0) =1a(1) =3a(2) =35a(3) =865a(4) =32917a(5) =1699311a(6) =111033607a(7) =8788108477a(8) =817439352233

External references