Primes whose base-7 representation also is the base-4 representation of a prime.

Terms

a(0) =2a(1) =3a(2) =17a(3) =59a(4) =71a(5) =73a(6) =113a(7) =353a(8) =367a(9) =449a(10) =463a(11) =491a(12) =701a(13) =743a(14) =757a(15) =787a(16) =857a(17) =1039a(18) =1151a(19) =1193a(20) =2411a(21) =2423a(22) =2467a(23) =2551a(24) =2843a(25) =3109a(26) =3137a(27) =3209a(28) =3251a(29) =4817