Numbers k such that phi(k) | sigma(k + 5).

Terms

a(0) =1a(1) =2a(2) =6a(3) =9a(4) =10a(5) =16a(6) =18a(7) =22a(8) =28a(9) =30a(10) =33a(11) =42a(12) =64a(13) =65a(14) =71a(15) =72a(16) =82a(17) =87a(18) =90a(19) =114a(20) =130a(21) =136a(22) =156a(23) =182a(24) =198a(25) =208a(26) =215a(27) =280a(28) =294a(29) =336