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A039325
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Numbers n such that representation in base 7 has same nonzero number of 3's and 6's.
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0
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27, 45, 76, 94, 125, 143, 153, 160, 167, 181, 188, 189, 190, 191, 193, 194, 223, 241, 272, 290, 297, 304, 311, 315, 316, 317, 319, 320, 325, 332, 370, 388, 419, 437, 468, 486, 496, 503, 510, 524, 531, 532, 533, 534, 536, 537, 566, 584, 615, 633, 640, 647
(list; graph; refs; listen; history; internal format)
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