Numbers k such that sigma(phi(k^3)) = phi(sigma(k^3)).
A063824
Numbers k such that sigma(phi(k^3)) = phi(sigma(k^3)).
Terms
- a(0) =1a(1) =9a(2) =81a(3) =225a(4) =2025a(5) =5625a(6) =50625a(7) =65025a(8) =585225a(9) =1625625a(10) =14630625
External references
- oeis: A063824