Numbers k such that (5*10^k - 473)/9 is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =9a(4) =10a(5) =16a(6) =27a(7) =46a(8) =97a(9) =103a(10) =214a(11) =229a(12) =241a(13) =285a(14) =643a(15) =999a(16) =3154a(17) =14115a(18) =43012a(19) =85855a(20) =87622a(21) =87712a(22) =90142a(23) =168379