a(n) = Product_{k=1..n} (64 - 8/k).A216704a(n) = Product_{k=1..n} (64 - 8/k).Terms a(0) =1a(1) =56a(2) =3360a(3) =206080a(4) =12776960a(5) =797282304a(6) =49963024384External referencesoeis: A216704