Composite numbers in A083137.

Terms

a(0) =323a(1) =767a(2) =989a(3) =10001a(4) =11111a(5) =13031a(6) =14141a(7) =14941a(8) =15151a(9) =17371a(10) =32023a(11) =33233a(12) =34343a(13) =36763a(14) =71017a(15) =73937a(16) =74147a(17) =74947a(18) =77177a(19) =77677a(20) =78587a(21) =90109a(22) =92629a(23) =94249a(24) =1006001a(25) =1013101a(26) =1024201a(27) =1033301a(28) =1047401a(29) =1049401