Numbers k such that one or both of sigma(k) + k and sigma(k) - k is a perfect number.
A382504
Numbers k such that one or both of sigma(k) + k and sigma(k) - k is a perfect number.
Terms
- a(0) =6a(1) =10a(2) =25a(3) =28a(4) =496a(5) =652a(6) =8128a(7) =10682a(8) =10828a(9) =33550336a(10) =44655764a(11) =8589869056a(12) =8623554304
External references
- oeis: A382504