Numbers n such that sigma(n) = 6*phi(n).

Terms

a(0) =6a(1) =70a(2) =616a(3) =1240a(4) =2090a(5) =8932a(6) =17980a(7) =19780a(8) =20320a(9) =26980a(10) =29512a(11) =43180a(12) =49742a(13) =51688a(14) =58058a(15) =79000a(16) =100130a(17) =116870a(18) =128570a(19) =175370a(20) =176715a(21) =201376a(22) =208280a(23) =221536a(24) =275770a(25) =280670a(26) =282680a(27) =302176a(28) =373065a(29) =427924