Numbers k such that (22*10^k - 19)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =14a(5) =15a(6) =24a(7) =48a(8) =78a(9) =112a(10) =122a(11) =334a(12) =504a(13) =872a(14) =914a(15) =1230a(16) =1506a(17) =2442a(18) =4095a(19) =5022a(20) =10615a(21) =11460a(22) =18303a(23) =33675a(24) =47701a(25) =55592a(26) =84159a(27) =146661a(28) =269517a(29) =287085