A043483 Numbers n such that number of 7's in base 9 is 3.

637, 1366, 2095, 2824, 3553, 4282, 5011, 5173, 5254, 5335, 5416, 5497, 5578, 5659, 5677, 5686, 5695, 5704, 5713, 5722, 5731, 5733, 5734, 5735, 5736, 5737, 5738, 5739, 5741, 5749, 5821, 6469, 7198, 7927, 8656, 9385, 10114