a(1) = 1, a(k) divides a(k+r) for all k and r and the ratios a(k+r)/a(k) are all different.

A079854

a(1) = 1, a(k) divides a(k+r) for all k and r and the ratios a(k+r)/a(k) are all different.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =840a(7) =6720a(8) =60480a(9) =604800a(10) =6652800a(11) =86486400a(12) =1210809600a(13) =18162144000a(14) =308756448000

External references