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

A101686

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

Terms

    a(0) =1a(1) =2a(2) =10a(3) =100a(4) =1700a(5) =44200a(6) =1635400a(7) =81770000a(8) =5315050000a(9) =435834100000

External references