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A037639
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Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1.
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0
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2, 11, 45, 182, 731, 2925, 11702, 46811, 187245, 748982, 2995931, 11983725, 47934902, 191739611, 766958445, 3067833782, 12271335131, 49085340525, 196341362102, 785365448411, 3141461793645, 12565847174582, 50263388698331
(list; graph; refs; listen; history; internal format)
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