Numbers k such that (46*10^k + 143)/9 is prime.

Terms

a(0) =1a(1) =8a(2) =20a(3) =28a(4) =40a(5) =41a(6) =71a(7) =208a(8) =263a(9) =346a(10) =455a(11) =743a(12) =878a(13) =920a(14) =1451a(15) =2980a(16) =4678a(17) =7748a(18) =13301a(19) =106343a(20) =170932