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A043406
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Numbers n such that number of 3's in base 7 is 2.
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0
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24, 73, 122, 150, 157, 164, 168, 169, 170, 172, 173, 174, 178, 185, 192, 220, 269, 318, 367, 416, 465, 493, 500, 507, 511, 512, 513, 515, 516, 517, 521, 528, 535, 563, 612, 661, 710, 759, 808, 836, 843, 850, 854, 855, 856, 858
(list; graph; refs; listen; history; internal format)
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