Expansion of e.g.f. exp(2*x*G(x)^2) where G(x) = 1 + x*G(x)^3 is the g.f. of A001764.

A380603

Expansion of e.g.f. exp(2*x*G(x)^2) where G(x) = 1 + x*G(x)^3 is the g.f. of A001764.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =140a(4) =2512a(5) =61392a(6) =1905184a(7) =71781824a(8) =3183563520a(9) =162497556224

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