Composite numbers k such that phi(k) divides 4*(k-1).
A193167
Composite numbers k such that phi(k) divides 4*(k-1).
Terms
- a(0) =4a(1) =6a(2) =8a(3) =10a(4) =12a(5) =15a(6) =28a(7) =66a(8) =91a(9) =561a(10) =946a(11) =6601a(12) =8911a(13) =6840001
External references
- oeis: A193167