Numbers k such that sigma(k) == 4 (mod phi(k)).
A067193
Numbers k such that sigma(k) == 4 (mod phi(k)).
Terms
- a(0) =24a(1) =27a(2) =44a(3) =66a(4) =75a(5) =170a(6) =944a(7) =1200a(8) =16064a(9) =260864a(10) =4189184a(11) =17179541504a(12) =274876596224
External references
- oeis: A067193