Primes of form 10*k + 9.

Terms

a(0) =19a(1) =29a(2) =59a(3) =79a(4) =89a(5) =109a(6) =139a(7) =149a(8) =179a(9) =199a(10) =229a(11) =239a(12) =269a(13) =349a(14) =359a(15) =379a(16) =389a(17) =409a(18) =419a(19) =439a(20) =449a(21) =479a(22) =499a(23) =509a(24) =569a(25) =599a(26) =619a(27) =659a(28) =709a(29) =719