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A115509
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Number of circular permutations where for every pair of adjacent elements one element in binary notation has ones at the same or adjacent positions to those of the other element.
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2
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1, 1, 2, 0, 0, 2, 4, 0, 0, 0, 0, 432, 1968, 24960, 161280, 0, 0, 0, 0, 0, 0
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