G.f. A(x) satisfies: A(x) = 1 / (1 - 3*x - x * A(2*x)).

A348904

G.f. A(x) satisfies: A(x) = 1 / (1 - 3*x - x * A(2*x)).

Terms

    a(0) =1a(1) =4a(2) =24a(3) =224a(4) =3264a(5) =76544a(6) =3055104a(7) =220125184a(8) =29946753024

External references