Numbers k such that phi(k) | sigma(k + 7).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =12a(9) =16a(10) =20a(11) =22a(12) =24a(13) =26a(14) =27a(15) =28a(16) =31a(17) =35a(18) =39a(19) =40a(20) =50a(21) =58a(22) =63a(23) =70a(24) =88a(25) =95a(26) =108a(27) =112a(28) =116a(29) =120