Iterate the function x <- phi(sigma(x)). The sequence lists the smaller member of cycles of length 2.
A373435
Iterate the function x <- phi(sigma(x)). The sequence lists the smaller member of cycles of length 2.
Terms
- a(0) =4a(1) =48a(2) =72a(3) =432a(4) =1728a(5) =10368a(6) =184320a(7) =1658880a(8) =6220800a(9) =10222080a(10) =12856320000
External references
- oeis: A373435