Primes whose base-7 representation also is the base-3 representation of a prime.

Terms

a(0) =2a(1) =7a(2) =107a(3) =401a(4) =443a(5) =457a(6) =701a(7) =743a(8) =751a(9) =2417a(10) =2753a(11) =2843a(12) =2851a(13) =3089a(14) =5147a(15) =5153a(16) =5503a(17) =16823a(18) =16921a(19) =17207a(20) =17257a(21) =17551a(22) =19553a(23) =19993a(24) =21617a(25) =21673a(26) =22003a(27) =22303a(28) =33623a(29) =33679