A044040 Numbers n such that 8 and 9 occur juxtaposed in the base 10 representation of n but not of n+1.

89, 98, 189, 198, 289, 298, 389, 398, 489, 498, 589, 598, 689, 698, 789, 798, 899, 989, 998, 1089, 1098, 1189, 1198, 1289, 1298, 1389, 1398, 1489, 1498, 1589, 1598, 1689, 1698, 1789, 1798, 1899, 1989, 1998, 2089, 2098, 2189