Numbers k for which sigma(k)/k - 4/9 is an integer.
A218415
Numbers k for which sigma(k)/k - 4/9 is an integer.
Terms
- a(0) =9a(1) =1782a(2) =2160a(3) =5400a(4) =13104a(5) =52141320a(6) =117641160a(7) =173365920a(8) =6829038720a(9) =12415092480a(10) =13356796320a(11) =104381747712a(12) =513480135168
External references
- oeis: A218415