Numbers n such that sigma(n)^2 > 9*sigma_2(n) where sigma_2(n) is the sum of squares over the divisors of n.

A068378

Numbers n such that sigma(n)^2 > 9*sigma_2(n) where sigma_2(n) is the sum of squares over the divisors of n.

Terms

    a(0) =5040a(1) =7560a(2) =10080a(3) =12600a(4) =13860a(5) =15120a(6) =17640a(7) =18480a(8) =20160a(9) =21840a(10) =22680a(11) =25200a(12) =27720a(13) =30240a(14) =32760a(15) =35280a(16) =36960a(17) =37800a(18) =39600a(19) =40320a(20) =41580a(21) =42840a(22) =43680a(23) =45360a(24) =46200a(25) =47520a(26) =47880a(27) =49140a(28) =50400a(29) =51480

External references