Numbers m such that m = 2*sigma(m)/3 - 1.
A063906
Numbers m such that m = 2*sigma(m)/3 - 1.
Terms
- a(0) =15a(1) =207a(2) =1023a(3) =2975a(4) =19359a(5) =147455a(6) =1207359a(7) =5017599a(8) =2170814463a(9) =58946212863
External references
- oeis: A063906