A043387 Numbers n such that number of 4's in base 6 is 3.

172, 388, 604, 820, 892, 928, 964, 1000, 1012, 1018, 1024, 1030, 1032, 1033, 1034, 1035, 1037, 1042, 1072, 1252, 1468, 1684, 1900, 2116, 2188, 2224, 2260, 2296, 2308, 2314, 2320, 2326, 2328, 2329, 2330, 2331, 2333, 2338