Positive integers whose binary representation is a palindrome and has a prime number of 1's.

Terms

a(0) =3a(1) =5a(2) =7a(3) =9a(4) =17a(5) =21a(6) =31a(7) =33a(8) =65a(9) =73a(10) =93a(11) =107a(12) =127a(13) =129a(14) =257a(15) =273a(16) =313a(17) =341a(18) =381a(19) =403a(20) =443a(21) =471a(22) =513a(23) =1025a(24) =1057a(25) =1137a(26) =1193a(27) =1273a(28) =1317a(29) =1397