Numbers k such that (2*10^k + 67)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =40a(6) =43a(7) =74a(8) =98a(9) =181a(10) =186a(11) =428a(12) =532a(13) =644a(14) =1664a(15) =2016a(16) =2476a(17) =2911a(18) =2959a(19) =3007a(20) =5964a(21) =7758a(22) =22231a(23) =92152