Palindromic primes in base 4.

Terms

a(0) =2a(1) =3a(2) =5a(3) =17a(4) =29a(5) =59a(6) =257a(7) =373a(8) =409a(9) =461a(10) =509a(11) =787a(12) =839a(13) =887a(14) =907a(15) =991a(16) =4289a(17) =4561a(18) =5189a(19) =5669a(20) =5861a(21) =6133a(22) =6217a(23) =6553a(24) =6761a(25) =7309a(26) =7517a(27) =7789a(28) =7853a(29) =12899