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

A171212

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

Terms

    a(0) =0a(1) =1a(2) =2a(3) =16a(4) =320a(5) =12928a(6) =985088a(7) =140861440a(8) =38451150848

External references