(N\{4})-perfect numbers, i.e., numbers m for which sigma(m)-4 = 2m, if 4|m, otherwise sigma(m) = 2m.
A181597
(N\{4})-perfect numbers, i.e., numbers m for which sigma(m)-4 = 2m, if 4|m, otherwise sigma(m) = 2m.
Terms
- a(0) =6a(1) =12a(2) =88a(3) =1888a(4) =32128a(5) =521728a(6) =1848964a(7) =8378368a(8) =34359083008a(9) =549753192448
External references
- oeis: A181597