Numbers k such that (2*10^k - 23)/3 is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =26a(4) =44a(5) =58a(6) =73a(7) =88a(8) =211a(9) =244a(10) =1393a(11) =2282a(12) =4108a(13) =6777a(14) =7480a(15) =14369a(16) =16153a(17) =21081a(18) =24308a(19) =27368a(20) =43455a(21) =51597a(22) =55559a(23) =67405a(24) =88112a(25) =148460a(26) =288371a(27) =297488