Numbers k such that (58*10^k + 221)/9 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =13a(5) =18a(6) =19a(7) =36a(8) =78a(9) =129a(10) =171a(11) =175a(12) =237a(13) =607a(14) =619a(15) =717a(16) =954a(17) =1386a(18) =3948a(19) =7939a(20) =16519a(21) =17686a(22) =18759a(23) =19986a(24) =36340a(25) =39547a(26) =44014a(27) =60579a(28) =170842