Numbers whose maximal base-9 run length is 2.

Terms

a(0) =10a(1) =20a(2) =30a(3) =40a(4) =50a(5) =60a(6) =70a(7) =80a(8) =81a(9) =90a(10) =92a(11) =93a(12) =94a(13) =95a(14) =96a(15) =97a(16) =98a(17) =101a(18) =111a(19) =121a(20) =131a(21) =141a(22) =151a(23) =161a(24) =162a(25) =172a(26) =180a(27) =181a(28) =183a(29) =184