Numbers k such that (19*10^k - 49)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =21a(8) =22a(9) =101a(10) =111a(11) =132a(12) =174a(13) =201a(14) =265a(15) =335a(16) =388a(17) =537a(18) =1011a(19) =1012a(20) =1254a(21) =6766a(22) =20236a(23) =55833a(24) =104014a(25) =134786a(26) =146181a(27) =159921a(28) =210011