Numbers n such that 10^n - 81 is prime.

Terms

a(0) =2a(1) =3a(2) =17a(3) =19a(4) =31a(5) =37a(6) =43a(7) =91a(8) =339a(9) =367a(10) =407a(11) =1135a(12) =1175a(13) =8653a(14) =11987a(15) =15793