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

Terms

a(0) =3a(1) =7a(2) =15a(3) =22a(4) =23a(5) =30a(6) =35a(7) =44a(8) =47a(9) =51a(10) =56a(11) =71a(12) =88a(13) =95a(14) =135a(15) =140a(16) =153a(17) =155a(18) =167a(19) =207a(20) =239a(21) =263a(22) =280a(23) =310a(24) =311a(25) =368a(26) =383a(27) =385a(28) =395a(29) =431