Numbers n such that (phi(n) + 1) | sigma(n + 1), where phi is Euler's totient function A000010.
A015775
Numbers n such that (phi(n) + 1) | sigma(n + 1), where phi is Euler's totient function A000010.
Terms
- a(0) =2a(1) =4a(2) =16a(3) =25a(4) =170a(5) =256a(6) =264a(7) =1920a(8) =9384a(9) =26664a(10) =65536a(11) =263040a(12) =437760a(13) =1057800a(14) =2038648320
External references
- oeis: A015775