Composite numbers which in base 9 contain their largest proper factor as a substring.

Terms

a(0) =1387a(1) =1849a(2) =2117a(3) =4307a(4) =8299a(5) =34547a(6) =35947a(7) =38491a(8) =68753a(9) =69679a(10) =84281a(11) =90637a(12) =128729a(13) =183097a(14) =185047a(15) =230689a(16) =281443a(17) =407837a(18) =423979a(19) =483029a(20) =664457a(21) =719399a(22) =904537a(23) =1056403a(24) =1121213a(25) =1236511a(26) =1247707a(27) =1303391a(28) =1308947a(29) =1369751