Numbers k such that 10^k + 81 is prime.

Terms

a(0) =2a(1) =6a(2) =8a(3) =17a(4) =22a(5) =39a(6) =89a(7) =143a(8) =167a(9) =312a(10) =334a(11) =357a(12) =414a(13) =2254a(14) =2694a(15) =24094a(16) =42081a(17) =78632