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

Terms

a(0) =47a(1) =719a(2) =1439a(3) =2879a(4) =4079a(5) =4127a(6) =5807a(7) =6047a(8) =7247a(9) =7727a(10) =9839a(11) =10799a(12) =11279a(13) =13967a(14) =14159a(15) =15647a(16) =21599a(17) =24527a(18) =28319a(19) =28607a(20) =42767a(21) =44687a(22) =45887a(23) =48479a(24) =51599a(25) =51839a(26) =67247a(27) =68639a(28) =72767a(29) =77279