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A037545
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Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2.
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0
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1, 6, 26, 105, 422, 1690, 6761, 27046, 108186, 432745, 1730982, 6923930, 27695721, 110782886, 443131546, 1772526185, 7090104742, 28360418970, 113441675881, 453766703526, 1815066814106, 7260267256425, 29041069025702
(list; graph; refs; listen; history; internal format)
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