Palindromes in A090272.

Terms

a(0) =11a(1) =313a(2) =727a(3) =919a(4) =11311a(5) =33533a(6) =77377a(7) =1114111a(8) =1212121a(9) =1311131a(10) =1411141a(11) =1513151a(12) =1611161a(13) =1712171a(14) =1917191a(15) =3135313a(16) =3233323a(17) =3331333a(18) =3439343a(19) =3635363a(20) =3732373a(21) =3836383a(22) =3931393a(23) =7073707a(24) =7177717a(25) =7276727a(26) =7472747