Numbers k such that sigma(k)/phi(k) sets a new record.

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) =1680a(16) =2520a(17) =4620a(18) =9240a(19) =13860a(20) =18480a(21) =27720a(22) =55440a(23) =110880a(24) =120120a(25) =180180a(26) =240240a(27) =360360a(28) =720720a(29) =1441440