G.f. A(x) satisfies A(x) = 1/(1-x)^2 + x^2 * (d/dx A(x)^2).

A386209

G.f. A(x) satisfies A(x) = 1/(1-x)^2 + x^2 * (d/dx A(x)^2).

Terms

    a(0) =1a(1) =2a(2) =7a(3) =40a(4) =329a(5) =3474a(6) =44127a(7) =650144a(8) =10862273a(9) =202632498a(10) =4172689415a(11) =94010964072

External references