Primes p such that 9*p + 8 is also prime.

Terms

a(0) =5a(1) =7a(2) =11a(3) =19a(4) =29a(5) =47a(6) =61a(7) =71a(8) =79a(9) =89a(10) =97a(11) =107a(12) =127a(13) =131a(14) =139a(15) =151a(16) =167a(17) =179a(18) =181a(19) =211a(20) =229a(21) =251a(22) =271a(23) =317a(24) =337a(25) =397a(26) =401a(27) =419a(28) =421a(29) =449