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

A171200

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

Terms

    a(0) =1a(1) =1a(2) =6a(3) =84a(4) =2312a(5) =121056a(6) =12173568a(7) =2391143424a(8) =928316362752

External references