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A037548
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Base 7 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, 9, 65, 456, 3194, 22360, 156521, 1095649, 7669545, 53686816, 375807714, 2630654000, 18414578001, 128902046009, 902314322065, 6316200254456, 44213401781194, 309493812468360, 2166456687278521
(list; graph; refs; listen; history; internal format)
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