Numbers k such that k and 8*k + 5 are both prime.

Terms

a(0) =3a(1) =7a(2) =13a(3) =19a(4) =43a(5) =67a(6) =103a(7) =109a(8) =127a(9) =139a(10) =151a(11) =181a(12) =193a(13) =199a(14) =211a(15) =223a(16) =241a(17) =277a(18) =283a(19) =349a(20) =379a(21) =397a(22) =421a(23) =433a(24) =439a(25) =463a(26) =577a(27) =601a(28) =607a(29) =613