Numbers k such that 4*phi(k) = 3*sigma(k).

Terms

a(0) =7a(1) =209a(2) =10013a(3) =11687a(4) =12857a(5) =17537a(6) =27577a(7) =28067a(8) =700321a(9) =770431a(10) =1321189a(11) =1542281a(12) =1681861a(13) =1963039a(14) =2282641a(15) =2313961a(16) =2664259a(17) =3308041a(18) =3709057a(19) =3859207a(20) =3929761a(21) =4315751a(22) =4380541a(23) =4561381a(24) =5193001a(25) =5331001a(26) =5576519a(27) =5962333a(28) =6561511a(29) =7332919