Numbers n such that sigma(n)/phi(n) = 16/9.

Terms

a(0) =1463a(1) =2945a(2) =8255a(3) =70091a(4) =81809a(5) =89999a(6) =122759a(7) =187625a(8) =193039a(9) =196469a(10) =388585a(11) =494665a(12) =671365a(13) =2311673a(14) =2442583a(15) =2687113a(16) =4209985a(17) =4705285a(18) =4902247a(19) =5393017a(20) =5667389a(21) =5866003a(22) =9248323a(23) =10795967a(24) =11345411a(25) =11670275a(26) =11773027a(27) =13290485a(28) =13741273a(29) =15978487