Phi(n) + 5 | sigma(n + 5).

Terms

a(0) =1a(1) =5a(2) =12a(3) =60a(4) =68a(5) =92a(6) =123a(7) =131a(8) =188a(9) =236a(10) =332a(11) =404a(12) =428a(13) =452a(14) =596a(15) =668a(16) =764a(17) =932a(18) =1004a(19) =1028a(20) =1124a(21) =1244a(22) =1604a(23) =1772a(24) =1796a(25) =1868a(26) =2012a(27) =2084a(28) =2276a(29) =2372