a(n) = Product_{k=0..n} binomial(2*n - k, k).

A296590

a(n) = Product_{k=0..n} binomial(2*n - k, k).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =30a(4) =1050a(5) =132300a(6) =61122600a(7) =104886381600

External references