Numbers k such that (349*10^k - 7)/9 is prime.

Terms

a(0) =2a(1) =12a(2) =21a(3) =30a(4) =63a(5) =86a(6) =140a(7) =173a(8) =308a(9) =318a(10) =402a(11) =410a(12) =441a(13) =492a(14) =2186a(15) =4580a(16) =5100a(17) =5208a(18) =5810a(19) =7476a(20) =21677a(21) =31766a(22) =45357a(23) =48036a(24) =66720