Primes whose base-7 representation also is the base-2 representation of a prime.

Terms

a(0) =7a(1) =2801a(2) =17207a(3) =19559a(4) =134513a(5) =134807a(6) =840743a(7) =842759a(8) =842801a(9) =941249a(10) =943601a(11) =958007a(12) =958049a(13) =958343a(14) =5899657a(15) =6591089a(16) =6607903a(17) =6706393a(18) =6722857a(19) =41196751a(20) =41311663a(21) =41314057a(22) =46137673a(23) =46137967a(24) =46253257a(25) =46942351a(26) =46944409a(27) =47059657