Numbers k such that (19*10^k - 37)/9 is prime.

Terms

a(0) =1a(1) =4a(2) =6a(3) =10a(4) =16a(5) =37a(6) =60a(7) =64a(8) =78a(9) =96a(10) =166a(11) =256a(12) =1294a(13) =1398a(14) =2044a(15) =2244a(16) =5080a(17) =7464a(18) =8041a(19) =17929a(20) =18144a(21) =29080a(22) =32623