"9ish numbers": decimal representation contains at least one nine.

Terms

a(0) =9a(1) =19a(2) =29a(3) =39a(4) =49a(5) =59a(6) =69a(7) =79a(8) =89a(9) =90a(10) =91a(11) =92a(12) =93a(13) =94a(14) =95a(15) =96a(16) =97a(17) =98a(18) =99a(19) =109a(20) =119a(21) =129a(22) =139a(23) =149a(24) =159a(25) =169a(26) =179a(27) =189a(28) =190a(29) =191