Primes p such that p + 4 is prime and p == 9 (mod 10).

Terms

a(0) =19a(1) =79a(2) =109a(3) =229a(4) =349a(5) =379a(6) =439a(7) =499a(8) =739a(9) =769a(10) =859a(11) =1009a(12) =1279a(13) =1429a(14) =1489a(15) =1549a(16) =1579a(17) =1609a(18) =1999a(19) =2239a(20) =2269a(21) =2389a(22) =2539a(23) =2659a(24) =2689a(25) =2749a(26) =3019a(27) =3079a(28) =3319a(29) =3529