a(n) = Product_{k=1..n} (k^2 + 21).

A271266

a(n) = Product_{k=1..n} (k^2 + 21).

Terms

    a(0) =1a(1) =22a(2) =550a(3) =16500a(4) =610500a(5) =28083000a(6) =1600731000a(7) =112051170000

External references