Numbers k such that (14*10^k - 53) / 3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =11a(6) =28a(7) =40a(8) =65a(9) =95a(10) =187a(11) =201a(12) =202a(13) =211a(14) =316a(15) =331a(16) =559a(17) =746a(18) =1307a(19) =2139a(20) =3571a(21) =5843a(22) =6545a(23) =12717a(24) =32804a(25) =46389a(26) =72326a(27) =135301