Numbers k such that 7*10^k - 17 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =11a(4) =16a(5) =33a(6) =35a(7) =37a(8) =39a(9) =42a(10) =64a(11) =94a(12) =123a(13) =136a(14) =308a(15) =309a(16) =310a(17) =357a(18) =965a(19) =1109a(20) =2178a(21) =8916a(22) =9471a(23) =18330a(24) =62127a(25) =252209