E.g.f. A(x) satisfies A(x) = 1 + (exp(x) - 1) * A(3*x).

A355088

E.g.f. A(x) satisfies A(x) = 1 + (exp(x) - 1) * A(3*x).

Terms

    a(0) =1a(1) =1a(2) =7a(3) =199a(4) =21883a(5) =8916991a(6) =13027669147

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