a(n) is the product of the first n terms of an arithmetic progression with the first term 1 and common difference n.

A092985

a(n) is the product of the first n terms of an arithmetic progression with the first term 1 and common difference n.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =28a(4) =585a(5) =22176a(6) =1339975a(7) =118514880a(8) =14454403425

External references