Numbers k such that 10^k + 987654321 is prime.

Terms

a(0) =6a(1) =11a(2) =15a(3) =27a(4) =42a(5) =113a(6) =135a(7) =186a(8) =207a(9) =503a(10) =2999a(11) =3005a(12) =3487a(13) =5718a(14) =7265a(15) =7629a(16) =11987a(17) =16063a(18) =27379a(19) =64770a(20) =73579a(21) =96504a(22) =116557