Binary palindromes: numbers whose binary expansion is palindromic.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =7a(5) =9a(6) =15a(7) =17a(8) =21a(9) =27a(10) =31a(11) =33a(12) =45a(13) =51a(14) =63a(15) =65a(16) =73a(17) =85a(18) =93a(19) =99a(20) =107a(21) =119a(22) =127a(23) =129a(24) =153a(25) =165a(26) =189a(27) =195a(28) =219a(29) =231