Odd palindromes in which parity of digits alternates.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =9a(5) =101a(6) =121a(7) =141a(8) =161a(9) =181a(10) =303a(11) =323a(12) =343a(13) =363a(14) =383a(15) =505a(16) =525a(17) =545a(18) =565a(19) =585a(20) =707a(21) =727a(22) =747a(23) =767a(24) =787a(25) =909a(26) =929a(27) =949a(28) =969a(29) =989