Let f(n) = Sum_{j>=1} j^n*3^j/binomial(2*j,j) = r_n*Pi/sqrt(3) + s_n; sequence gives s_n.

A181374

Let f(n) = Sum_{j>=1} j^n*3^j/binomial(2*j,j) = r_n*Pi/sqrt(3) + s_n; sequence gives s_n.

Terms

    a(0) =3a(1) =18a(2) =156a(3) =1890a(4) =29496a(5) =563094a(6) =12709956a(7) =331109658a(8) =9777612432a(9) =322738005150

External references