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

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =12a(5) =14a(6) =19a(7) =26a(8) =28a(9) =72a(10) =79a(11) =273a(12) =565a(13) =990a(14) =1166a(15) =2205a(16) =4212a(17) =5340a(18) =5562a(19) =9877a(20) =10297a(21) =14316a(22) =35908a(23) =48410a(24) =61525