Numbers k such that (536*10^k - 23)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =7a(4) =8a(5) =11a(6) =17a(7) =61a(8) =73a(9) =89a(10) =197a(11) =233a(12) =308a(13) =2096a(14) =3170a(15) =8003a(16) =15014a(17) =16166a(18) =26021a(19) =55748a(20) =102533a(21) =171601