A044421 Numbers n such that string 8,9 occurs in the base 10 representation of n but not of n-1.

89, 189, 289, 389, 489, 589, 689, 789, 889, 989, 1089, 1189, 1289, 1389, 1489, 1589, 1689, 1789, 1889, 1989, 2089, 2189, 2289, 2389, 2489, 2589, 2689, 2789, 2889, 2989, 3089, 3189, 3289, 3389, 3489, 3589, 3689, 3789, 3889