A044877 Numbers having, in base 6, (sum of even run lengths)=(sum of odd run lengths).

217, 218, 219, 220, 221, 223, 230, 237, 244, 251, 253, 254, 255, 256, 257, 264, 265, 267, 268, 269, 270, 271, 272, 274, 275, 276, 277, 278, 279, 281, 282, 283, 284, 285, 286, 288, 295, 300, 301, 303, 304, 305, 309, 316, 323