Numbers k such that 12*10^k - 7 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =5a(5) =8a(6) =11a(7) =21a(8) =25a(9) =105a(10) =191a(11) =305a(12) =463a(13) =704a(14) =1320a(15) =1404a(16) =1580a(17) =1675a(18) =2215a(19) =3475a(20) =6323a(21) =10560a(22) =28817a(23) =30356a(24) =98198