Irregular triangle, read by rows, of primes with prefix n and digits "9" appended, otherwise 0.

Terms

a(0) =19a(1) =199a(2) =1999a(3) =29a(4) =0a(5) =0a(6) =59a(7) =599a(8) =0a(9) =79a(10) =89a(11) =0a(12) =109a(13) =0a(14) =0a(15) =139a(16) =1399a(17) =13999a(18) =139999a(19) =1399999a(20) =149a(21) =1499a(22) =0a(23) =0a(24) =179a(25) =0a(26) =199a(27) =1999a(28) =0a(29) =0