Primes of the form 4*k-1 such that 8*k-1 and 16*k-1 are also primes.

Terms

a(0) =11a(1) =179a(2) =359a(3) =719a(4) =1019a(5) =1031a(6) =1451a(7) =1511a(8) =1811a(9) =1931a(10) =2459a(11) =2699a(12) =2819a(13) =3491a(14) =3539a(15) =3911a(16) =5399a(17) =6131a(18) =7079a(19) =7151a(20) =10691a(21) =11171a(22) =11471a(23) =12119a(24) =12899a(25) =12959a(26) =16811a(27) =17159a(28) =18191a(29) =19319