a(n) = (1/n) * Sum_{k = 0..2*n} (n+2*k) * binomial(n+k-1,k)^3.

A361885

a(n) = (1/n) * Sum_{k = 0..2*n} (n+2*k) * binomial(n+k-1,k)^3.

Terms

    a(0) =9a(1) =979a(2) =165816a(3) =33372819a(4) =7380882509

External references