Numbers k such that (13*10^k - 43)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =8a(5) =12a(6) =55a(7) =125a(8) =136a(9) =221a(10) =224a(11) =668a(12) =1254a(13) =2639a(14) =4745a(15) =5888a(16) =8526a(17) =9139a(18) =13771a(19) =17936a(20) =27713a(21) =38668a(22) =44680a(23) =73891a(24) =135184a(25) =200610a(26) =215592a(27) =247793a(28) =258710a(29) =291721