Base-4 palindromes that start with 3.

Terms

a(0) =3a(1) =15a(2) =51a(3) =55a(4) =59a(5) =63a(6) =195a(7) =215a(8) =235a(9) =255a(10) =771a(11) =787a(12) =803a(13) =819a(14) =839a(15) =855a(16) =871a(17) =887a(18) =907a(19) =923a(20) =939a(21) =955a(22) =975a(23) =991a(24) =1007a(25) =1023a(26) =3075a(27) =3155a(28) =3235a(29) =3315