Primes p such that 4*p + 5 is also prime.

Terms

a(0) =2a(1) =3a(2) =17a(3) =23a(4) =47a(5) =59a(6) =83a(7) =101a(8) =107a(9) =113a(10) =149a(11) =167a(12) =191a(13) =233a(14) =251a(15) =257a(16) =281a(17) =311a(18) =401a(19) =443a(20) =449a(21) =467a(22) =503a(23) =521a(24) =569a(25) =593a(26) =617a(27) =647a(28) =653a(29) =677