G.f. A(x) satisfies: -1 = Product_{n>=1} (1 - A(x)^n) * (1 - A(x)^n/x) * (1 - A(x)^(n-1)*x).

A268299

G.f. A(x) satisfies: -1 = Product_{n>=1} (1 - A(x)^n) * (1 - A(x)^n/x) * (1 - A(x)^(n-1)*x).

Terms

    a(0) =2a(1) =7a(2) =84a(3) =1240a(4) =20942a(5) =382344a(6) =7354688a(7) =146810440a(8) =3012778758a(9) =63167322872

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