Palindromic primes with middle digit 3.

Terms

a(0) =3a(1) =131a(2) =10301a(3) =11311a(4) =13331a(5) =14341a(6) =16361a(7) =19391a(8) =32323a(9) =35353a(10) =71317a(11) =76367a(12) =77377a(13) =79397a(14) =94349a(15) =97379a(16) =98389a(17) =1003001a(18) =1043401a(19) =1093901a(20) =1123211a(21) =1153511a(22) =1163611a(23) =1183811a(24) =1193911a(25) =1243421a(26) =1253521a(27) =1273721a(28) =1303031a(29) =1333331