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A037504
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Base-3 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,0.
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0
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1, 5, 15, 46, 140, 420, 1261, 3785, 11355, 34066, 102200, 306600, 919801, 2759405, 8278215, 24834646, 74503940, 223511820, 670535461, 2011606385, 6034819155, 18104457466, 54313372400, 162940117200, 488820351601
(list; graph; refs; listen; history; internal format)
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