Primes p such that 10*p + 1 is also prime.

Terms

a(0) =3a(1) =7a(2) =13a(3) =19a(4) =31a(5) =43a(6) =97a(7) =103a(8) =109a(9) =151a(10) =157a(11) =181a(12) =193a(13) =211a(14) =241a(15) =271a(16) =337a(17) =349a(18) =367a(19) =409a(20) =421a(21) =439a(22) =487a(23) =523a(24) =547a(25) =571a(26) =601a(27) =613a(28) =631a(29) =691