Palindromes p = A002113(n) whose index n is a substring of p.

Terms

a(0) =11a(1) =1111a(2) =12221a(3) =23332a(4) =34443a(5) =45554a(6) =56665a(7) =67776a(8) =78887a(9) =89998a(10) =101101a(11) =111111a(12) =121121a(13) =131131a(14) =141141a(15) =151151a(16) =161161a(17) =171171a(18) =181181a(19) =191191a(20) =1020201a(21) =1121211a(22) =1222221a(23) =1323231a(24) =1424241a(25) =1525251a(26) =1626261a(27) =1727271a(28) =1828281a(29) =1929291