Primes p == 7, 19, 23 (mod 40) such that (p-1)/2 is also prime.

Terms

a(0) =7a(1) =23a(2) =47a(3) =59a(4) =167a(5) =179a(6) =263a(7) =383a(8) =503a(9) =863a(10) =887a(11) =983a(12) =1019a(13) =1367a(14) =1487a(15) =1619a(16) =1823a(17) =2063a(18) =2099a(19) =2207a(20) =2447a(21) =2459a(22) =2579a(23) =2819a(24) =2903a(25) =3023a(26) =3167a(27) =3623a(28) =3779a(29) =3863