Numbers n such that 10^n-9^(n-1) is prime.

Terms

a(0) =3a(1) =9a(2) =15a(3) =155a(4) =217a(5) =281a(6) =287a(7) =491a(8) =563a(9) =581a(10) =983a(11) =2243a(12) =4375a(13) =8409a(14) =98669