Palindromes in which parity of digits alternates.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =101a(11) =121a(12) =141a(13) =161a(14) =181a(15) =212a(16) =232a(17) =252a(18) =272a(19) =292a(20) =303a(21) =323a(22) =343a(23) =363a(24) =383a(25) =414a(26) =434a(27) =454a(28) =474a(29) =494