Palindromic primes using only odd digits (1, 3, 5, 7 or 9).

Terms

a(0) =3a(1) =5a(2) =7a(3) =11a(4) =131a(5) =151a(6) =191a(7) =313a(8) =353a(9) =373a(10) =757a(11) =797a(12) =919a(13) =11311a(14) =13331a(15) =13931a(16) =15551a(17) =17971a(18) =19391a(19) =19991a(20) =31513a(21) =33533a(22) =35153a(23) =35353a(24) =35753a(25) =37573a(26) =71317a(27) =71917a(28) =75557a(29) =77377