Numbers k such that 171*2^k+1 is prime.

Terms

a(0) =8a(1) =9a(2) =24a(3) =32a(4) =71a(5) =117a(6) =141a(7) =144a(8) =369a(9) =393a(10) =575a(11) =837a(12) =921a(13) =1007a(14) =3825a(15) =3837a(16) =18813a(17) =21731a(18) =25233a(19) =36261a(20) =57104a(21) =128301a(22) =299840a(23) =404379a(24) =714200a(25) =717731a(26) =910544a(27) =1061853a(28) =1658303