Numbers k such that (14*10^k - 101)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =14a(5) =20a(6) =305a(7) =470a(8) =507a(9) =1104a(10) =1152a(11) =1725a(12) =1944a(13) =5864a(14) =6785a(15) =7446a(16) =11460a(17) =12412a(18) =16302a(19) =19787a(20) =24029a(21) =27240a(22) =67235a(23) =83471a(24) =89480a(25) =116112