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A043409
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Numbers n such that number of 4's in base 7 is 1.
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0
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4, 11, 18, 25, 28, 29, 30, 31, 33, 34, 39, 46, 53, 60, 67, 74, 77, 78, 79, 80, 82, 83, 88, 95, 102, 109, 116, 123, 126, 127, 128, 129, 131, 132, 137, 144, 151, 158, 165, 172, 175, 176, 177, 178, 180, 181, 186, 193, 196, 197, 198, 199
(list; graph; refs; listen; history; internal format)
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