Integers k such that uphi(k) divides k, where uphi is the unitary phi function (A047994).

A319481

Integers k such that uphi(k) divides k, where uphi is the unitary phi function (A047994).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =12a(4) =168a(5) =240a(6) =14880a(7) =65280a(8) =4294901760a(9) =7608944640

External references