A048309 Numbers whose base-12 expansions, read from left to right, have run lengths that strictly increase.
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 144, 157, 170, 183, 196, 209, 222, 235, 248, 261, 274, 287, 288, 301, 314, 327, 340, 353, 366, 379, 392, 405, 418, 431, 432, 445, 458, 471, 484, 497, 510, 523, 536, 549, 562
Offset: 0