Iterate the function x <- phi(sigma(x)). The sequence has the smallest member of cycles of length 3.
A373453
Iterate the function x <- phi(sigma(x)). The sequence has the smallest member of cycles of length 3.
Terms
- a(0) =16a(1) =1200a(2) =15552a(3) =67392a(4) =272160a(5) =69672960000
External references
- oeis: A373453