Numbers k such that prime(k) == -1 (mod sigma(k)).

Terms

a(0) =1a(1) =5a(2) =13a(3) =15a(4) =31a(5) =39a(6) =49a(7) =96a(8) =111a(9) =205a(10) =215a(11) =452a(12) =492a(13) =712a(14) =1258a(15) =5599a(16) =10170a(17) =11514a(18) =32844a(19) =58841a(20) =59550a(21) =83251a(22) =83650a(23) =115139a(24) =120485a(25) =144835a(26) =152583a(27) =467583a(28) =709178a(29) =1617217