A043660 Numbers n such that base 13 representation has exactly 5 runs.

28731, 28732, 28733, 28734, 28735, 28736, 28737, 28738, 28739, 28740, 28741, 28742, 28756, 28757, 28759, 28760, 28761, 28762, 28763, 28764, 28765, 28766, 28767, 28768, 28769, 28770, 28771, 28773, 28774, 28775