a(n) = Product_{i = 0..n-1} ((3*i+1)!*(6*i)!*(2*i)!)/((4*i)!*(4*i+1)!).

A049504

a(n) = Product_{i = 0..n-1} ((3*i+1)!*(6*i)!*(2*i)!)/((4*i)!*(4*i+1)!).

Terms

    a(0) =1a(1) =1a(2) =12a(3) =47520a(4) =266499072000

External references