G.f. A(x) satisfies: Sum_{k=0..n} [x^k] A(x)^n = binomial(6*n,3*n).

A244652

G.f. A(x) satisfies: Sum_{k=0..n} [x^k] A(x)^n = binomial(6*n,3*n).

Terms

    a(0) =1a(1) =19a(2) =262a(3) =3322a(4) =41455a(5) =520165a(6) =6602716a(7) =84860884a(8) =1103478733a(9) =14500102087a(10) =192309166018

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