Numbers k for which sigma(k)/k - 2/7 is an integer.
A218409
Numbers k for which sigma(k)/k - 2/7 is an integer.
Terms
- a(0) =42a(1) =3472a(2) =56896a(3) =544635a(4) =2056320a(5) =4021920a(6) =4357080a(7) =6420960a(8) =234852352a(9) =1980840960a(10) =19017782784a(11) =21231974400a(12) =60129083392a(13) =962070839296
External references
- oeis: A218409