Group even numbers into (2), (4,6), (8,10,12), (14,16,18,20), ...; a(n) = product of n-th group.

A062029

Group even numbers into (2), (4,6), (8,10,12), (14,16,18,20), ...; a(n) = product of n-th group.

Terms

    a(0) =2a(1) =24a(2) =960a(3) =80640a(4) =11531520a(5) =2500485120a(6) =763847884800

External references