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

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =10a(5) =14a(6) =25a(7) =34a(8) =40a(9) =63a(10) =74a(11) =129a(12) =149a(13) =345a(14) =370a(15) =425a(16) =477a(17) =627a(18) =951a(19) =1610a(20) =2564a(21) =2689a(22) =4227a(23) =7300a(24) =7444a(25) =8360a(26) =16541a(27) =21187a(28) =25685a(29) =31803