A030148 Odd palindromes in which parity of digits alternates.

1, 3, 5, 7, 9, 101, 121, 141, 161, 181, 303, 323, 343, 363, 383, 505, 525, 545, 565, 585, 707, 727, 747, 767, 787, 909, 929, 949, 969, 989, 10101, 10301, 10501, 10701, 10901, 12121, 12321, 12521, 12721, 12921, 14141, 14341, 14541, 14741