Numbers k such that 9*10^k - 19 is prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =6a(4) =7a(5) =10a(6) =11a(7) =22a(8) =24a(9) =138a(10) =140a(11) =152a(12) =698a(13) =1180a(14) =1270a(15) =2970a(16) =3932a(17) =4972a(18) =5982a(19) =6287a(20) =8936a(21) =16014a(22) =25186a(23) =59862a(24) =130998