Primes p such that 6p + 1 and (p-1)/6 are primes.

Terms

a(0) =13a(1) =103a(2) =283a(3) =367a(4) =607a(5) =787a(6) =907a(7) =1987a(8) =2203a(9) =2767a(10) =3643a(11) =4507a(12) =5623a(13) =5827a(14) =6907a(15) =7927a(16) =7963a(17) =8167a(18) =8887a(19) =9067a(20) =9643a(21) =10867a(22) =11083a(23) =11443a(24) =12487a(25) =13723a(26) =14083a(27) =14143a(28) =16747a(29) =17107