Group odd numbers into (1), (3,5), (7,9,11), (13,15,17,19), ...; a(n) = product of n-th group.

A062032

Group odd numbers into (1), (3,5), (7,9,11), (13,15,17,19), ...; a(n) = product of n-th group.

Terms

    a(0) =1a(1) =15a(2) =693a(3) =62985a(4) =9454725a(5) =2118331215a(6) =662496582825

External references