Numbers k such that sigma(k) == 2 (mod k).
A045768
Numbers k such that sigma(k) == 2 (mod k).
Terms
- a(0) =1a(1) =20a(2) =104a(3) =464a(4) =650a(5) =1952a(6) =130304a(7) =522752a(8) =8382464a(9) =134193152a(10) =549754241024
External references
- oeis: A045768