Primes p such that p+4 and p+16 are also primes.

Terms

a(0) =3a(1) =7a(2) =13a(3) =37a(4) =43a(5) =67a(6) =97a(7) =163a(8) =223a(9) =277a(10) =463a(11) =487a(12) =643a(13) =757a(14) =823a(15) =937a(16) =967a(17) =1087a(18) =1093a(19) =1213a(20) =1303a(21) =1423a(22) =1483a(23) =1567a(24) =1597a(25) =1693a(26) =1873a(27) =2083a(28) =2137a(29) =2293