Numbers k for which sigma(k^2)/k^2 reaches a new record, where sigma = A000203.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =24a(6) =30a(7) =60a(8) =120a(9) =180a(10) =210a(11) =360a(12) =420a(13) =840a(14) =1260a(15) =2520a(16) =4620a(17) =9240a(18) =13860a(19) =27720a(20) =55440a(21) =60060a(22) =120120a(23) =180180a(24) =360360a(25) =720720a(26) =1441440a(27) =1801800a(28) =2042040a(29) =3063060