Numbers n such that sigma(n) = 7*phi(n).

Terms

a(0) =12a(1) =78a(2) =140a(3) =910a(4) =2214a(5) =4180a(6) =4674a(7) =8008a(8) =16120a(9) =25758a(10) =27170a(11) =46816a(12) =54530a(13) =58302a(14) =94240a(15) =99484a(16) =116116a(17) =200260a(18) =233740a(19) =257140a(20) =264160a(21) =350740a(22) =371898a(23) =383656a(24) =479864a(25) =518022a(26) =523218a(27) =551540a(28) =561340a(29) =575598