Numbers k such that (44*10^k - 413)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =8a(3) =9a(4) =12a(5) =17a(6) =23a(7) =26a(8) =51a(9) =113a(10) =236a(11) =509a(12) =1659a(13) =2769a(14) =5258a(15) =8456a(16) =8787a(17) =11487a(18) =19367a(19) =28094a(20) =36114a(21) =69663a(22) =115697