Primes p such that 6*p + 1 is also prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =23a(8) =37a(9) =47a(10) =61a(11) =73a(12) =83a(13) =101a(14) =103a(15) =107a(16) =131a(17) =137a(18) =151a(19) =173a(20) =181a(21) =233a(22) =241a(23) =257a(24) =263a(25) =271a(26) =277a(27) =283a(28) =293a(29) =311