A043423 Numbers n such that number of 0's in base 8 is 3.

512, 1024, 1536, 2048, 2560, 3072, 3584, 4097, 4098, 4099, 4100, 4101, 4102, 4103, 4104, 4112, 4120, 4128, 4136, 4144, 4152, 4160, 4224, 4288, 4352, 4416, 4480, 4544, 4608, 5120, 5632, 6144, 6656, 7168, 7680, 8193, 8194