Numbers k such that 4*10^k + 19 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =9a(5) =11a(6) =19a(7) =27a(8) =31a(9) =36a(10) =42a(11) =69a(12) =86a(13) =98a(14) =152a(15) =205a(16) =533a(17) =587a(18) =1302a(19) =1506a(20) =1521a(21) =1573a(22) =1807a(23) =3906a(24) =6461a(25) =9081a(26) =11766a(27) =12595a(28) =15697a(29) =17154