G.f. A(x) satisfies: A(x) = 1 / (1 - x * A(4*x)^2).

A349287

G.f. A(x) satisfies: A(x) = 1 / (1 - x * A(4*x)^2).

Terms

    a(0) =1a(1) =1a(2) =9a(3) =321a(4) =42937a(5) =22259313a(6) =45726174057

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