Composite c such that sigma(c)==2 (mod phi(c)).
A067192
Composite c such that sigma(c)==2 (mod phi(c)).
Terms
- a(0) =10a(1) =20a(2) =52a(3) =232a(4) =976a(5) =1332a(6) =65152a(7) =261376a(8) =4191232a(9) =67096576a(10) =274877120512
External references
- oeis: A067192