Palindromic primes with middle digit 5.

Terms

a(0) =5a(1) =151a(2) =353a(3) =757a(4) =10501a(5) =15551a(6) =16561a(7) =31513a(8) =33533a(9) =34543a(10) =36563a(11) =37573a(12) =70507a(13) =75557a(14) =97579a(15) =1035301a(16) =1055501a(17) =1065601a(18) =1085801a(19) =1145411a(20) =1175711a(21) =1215121a(22) =1235321a(23) =1245421a(24) =1335331a(25) =1535351a(26) =1565651a(27) =1685861a(28) =1695961a(29) =1755571