Numbers k for which sigma(k)/k - 2/5 is an integer.

A218407

Numbers k for which sigma(k)/k - 2/5 is an integer.

Terms

    a(0) =30a(1) =140a(2) =2480a(3) =6200a(4) =40640a(5) =297600a(6) =997920a(7) =64995840a(8) =167751680a(9) =1502582400a(10) =42949345280a(11) =183196016640a(12) =687193456640

External references