G.f. satisfies: A(x) = (1 + x*A(2x))^3.

A171201

G.f. satisfies: A(x) = (1 + x*A(2x))^3.

Terms

    a(0) =1a(1) =3a(2) =21a(3) =289a(4) =7566a(5) =380424a(6) =37361616a(7) =7252471584

External references