Palindromic primes in the sense of A007500 with digits '0', '1' and '5' only.

Terms

a(0) =5a(1) =11a(2) =101a(3) =151a(4) =1151a(5) =1511a(6) =10151a(7) =10501a(8) =11551a(9) =15101a(10) =15511a(11) =15551a(12) =100511a(13) =110051a(14) =115001a(15) =150011a(16) =150151a(17) =151051a(18) =1001551a(19) =1051051a(20) =1055501a(21) =1115551a(22) =1150151a(23) =1150511a(24) =1501501a(25) =1510511a(26) =1550551a(27) =1551001a(28) =1551551a(29) =1555111