Numbers k such that 7*10^k + 39 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =12a(5) =19a(6) =26a(7) =32a(8) =84a(9) =164a(10) =199a(11) =251a(12) =306a(13) =510a(14) =641a(15) =1028a(16) =1147a(17) =1802a(18) =1948a(19) =2058a(20) =2243a(21) =2257a(22) =4282a(23) =7900a(24) =7941a(25) =10179a(26) =10723a(27) =13570a(28) =20565a(29) =29132