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

Terms

a(0) =23a(1) =359a(2) =719a(3) =1439a(4) =2039a(5) =2063a(6) =2903a(7) =3023a(8) =3623a(9) =3863a(10) =4919a(11) =5399a(12) =5639a(13) =6983a(14) =7079a(15) =7823a(16) =10799a(17) =12263a(18) =14159a(19) =14303a(20) =21383a(21) =22343a(22) =22943a(23) =24239a(24) =25799a(25) =25919a(26) =33623a(27) =34319a(28) =36383a(29) =38639