Smallest k > 6 such that sigma_n(k)/phi(k) is an integer.
A078538
Smallest k > 6 such that sigma_n(k)/phi(k) is an integer.
Terms
- a(0) =12a(1) =22a(2) =12a(3) =249a(4) =12a(5) =22a(6) =12a(7) =19689a(8) =12a(9) =22a(10) =12a(11) =249a(12) =12a(13) =22a(14) =12
External references
- oeis: A078538