A044391 Numbers n such that string 5,9 occurs in the base 10 representation of n but not of n-1.

59, 159, 259, 359, 459, 559, 590, 659, 759, 859, 959, 1059, 1159, 1259, 1359, 1459, 1559, 1590, 1659, 1759, 1859, 1959, 2059, 2159, 2259, 2359, 2459, 2559, 2590, 2659, 2759, 2859, 2959, 3059, 3159, 3259, 3359, 3459, 3559