Numbers k such that Sum_{j=1..k} phi(j)^j == 0 (mod k).
A229209
Numbers k such that Sum_{j=1..k} phi(j)^j == 0 (mod k).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =7a(4) =11a(5) =39a(6) =126a(7) =266a(8) =683a(9) =2514a(10) =12929
External references
- oeis: A229209