G.f. satisfies: A(x) = Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k) * (A(x)^k + x^k)^k * x^(k*(n-k)).

A245108

G.f. satisfies: A(x) = Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k) * (A(x)^k + x^k)^k * x^(k*(n-k)).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =17a(4) =89a(5) =556a(6) =3982a(7) =31177a(8) =261069a(9) =2309922a(10) =21435122a(11) =207605687a(12) =2091924418a(13) =21883241424a(14) =237301377573

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