Palindromic primes p = q//r//q such that q and r are also palindromic primes.

Terms

a(0) =353a(1) =373a(2) =727a(3) =757a(4) =11311a(5) =31013a(6) =31513a(7) =33533a(8) =37273a(9) =37573a(10) =39293a(11) =71317a(12) =71917a(13) =77977a(14) =1175711a(15) =1178711a(16) =1317131a(17) =1513151a(18) =1917191a(19) =3103013a(20) =3106013a(21) =3127213a(22) =3135313a(23) =3155513a(24) =3160613a(25) =3166613a(26) =3181813a(27) =3193913a(28) =3198913a(29) =3304033