a(n) = (-1)^n * Sum_{k=0..n} (-n)^k * binomial(n,k) * Catalan(k).

A339001

a(n) = (-1)^n * Sum_{k=0..n} (-n)^k * binomial(n,k) * Catalan(k).

Terms

    a(0) =1a(1) =0a(2) =5a(3) =89a(4) =2481a(5) =93274a(6) =4450645a(7) =258297570a(8) =17689681345

External references