Integers m such that m and sigma(m) are relatively prime and sigma(sigma(m))/m is an integer.
A328265
Integers m such that m and sigma(m) are relatively prime and sigma(sigma(m))/m is an integer.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =21a(6) =64a(7) =512a(8) =4096a(9) =29127a(10) =65536a(11) =262144a(12) =1073741824a(13) =355744082763
External references
- oeis: A328265