Smallest palindromic prime built using the palindromes with odd number of digits as central digits.

Terms

a(0) =313a(1) =727a(2) =131a(3) =11411a(4) =151a(5) =10601a(6) =373a(7) =181a(8) =191a(9) =31013a(10) =1311131a(11) =1212121a(12) =11311a(13) =11411a(14) =31513a(15) =1616161a(16) =1117111a(17) =1218121a(18) =71917a(19) =1120211a(20) =1221221a(21) =72227a(22) =32323a(23) =12421a(24) =3425243a(25) =1126211a(26) =12721a(27) =12821a(28) =1129211a(29) =73037