Numbers n such that the sum of the first k divisors of n^2+1 is equal to n for some k.
A194578
Numbers n such that the sum of the first k divisors of n^2+1 is equal to n for some k.
Terms
- a(0) =1a(1) =3a(2) =43a(3) =68a(4) =93a(5) =228a(6) =612a(7) =1903a(8) =32292a(9) =44868a(10) =252072a(11) =36564198a(12) =55862807a(13) =134735264
External references
- oeis: A194578