Numbers k such that phi(sigma(k)) - sigma(phi(k)) = 1.
A116083
Numbers k such that phi(sigma(k)) - sigma(phi(k)) = 1.
Terms
- a(0) =2a(1) =6a(2) =8a(3) =24a(4) =128a(5) =384a(6) =32768a(7) =98304a(8) =2147483648a(9) =6442450944
External references
- oeis: A116083