Numbers k such that (23*10^k + 19)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =9a(5) =10a(6) =11a(7) =17a(8) =95a(9) =115a(10) =499a(11) =1048a(12) =1557a(13) =3392a(14) =4841a(15) =5174a(16) =11427a(17) =12044a(18) =14984a(19) =16747a(20) =38936a(21) =44492a(22) =110290a(23) =149655