a(n) = C(2n,n) * (8^n/n!^2) * Product_{k=0..n-1} (8k+3)*(8k+5).

A184888

a(n) = C(2n,n) * (8^n/n!^2) * Product_{k=0..n-1} (8k+3)*(8k+5).

Terms

    a(0) =1a(1) =240a(2) =205920a(3) =243443200a(4) =333578044800

External references