a(1) = 3 = 1*3; a(n) = smallest multiple of a(n-1) which is of the form k(k+2).

A068859

a(1) = 3 = 1*3; a(n) = smallest multiple of a(n-1) which is of the form k(k+2).

Terms

    a(0) =3a(1) =15a(2) =120a(3) =360a(4) =5040a(5) =201600a(6) =256032000

External references