A048320 Reading base 9 expansion from left to right, run lengths strictly decrease.

0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 20, 30, 40, 50, 60, 70, 80, 90, 91, 92, 93, 94, 95, 96, 97, 98, 180, 181, 182, 183, 184, 185, 186, 187, 188, 270, 271, 272, 273, 274, 275, 276, 277, 278, 360, 361, 362, 363, 364, 365, 366, 367, 368, 450, 451, 452, 453, 454, 455, 456