Numbers m such that sigma(2*m-1) = 3*m, where sigma(k) is the sum of the positive divisors of k.
A190786
Numbers m such that sigma(2*m-1) = 3*m, where sigma(k) is the sum of the positive divisors of k.
Terms
- a(0) =8a(1) =104a(2) =512a(3) =1488a(4) =9680a(5) =73728a(6) =603680a(7) =2508800a(8) =1085407232a(9) =29473106432
External references
- oeis: A190786