Numbers k such that (142*10^k - 7)/9 is prime.

Terms

a(0) =1a(1) =8a(2) =16a(3) =23a(4) =32a(5) =86a(6) =202a(7) =214a(8) =332a(9) =443a(10) =760a(11) =1066a(12) =1270a(13) =2210a(14) =4189a(15) =5759a(16) =6886a(17) =9286a(18) =21205a(19) =22139a(20) =24784a(21) =35021a(22) =63734a(23) =112352