Numbers k such that k-1 | sigma+(k) where sigma+ is A107758.

A386390

Numbers k such that k-1 | sigma+(k) where sigma+ is A107758.

Terms

    a(0) =2a(1) =6a(2) =66a(3) =225a(4) =8646a(5) =101025a(6) =149497986a(7) =20412000225

External references