Sum of proper divisors minus the number of proper divisors of the perfect number A000396(n).
A154896
Sum of proper divisors minus the number of proper divisors of the perfect number A000396(n).
Terms
- a(0) =3a(1) =23a(2) =487a(3) =8115a(4) =33550311a(5) =8589869023a(6) =137438691291
External references
- oeis: A154896