Numbers k such that (71*10^k - 539)/9 is prime.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =10a(5) =13a(6) =76a(7) =93a(8) =141a(9) =202a(10) =274a(11) =445a(12) =907a(13) =1233a(14) =1366a(15) =2131a(16) =2590a(17) =2979a(18) =3489a(19) =3735a(20) =95277a(21) =148306a(22) =165663