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A147887
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Number of permutations of floor(i*7/4), i=0..n-1, with all sums of two adjacent terms unique.
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0
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1, 2, 6, 24, 96, 528, 2418, 14676, 109882, 996240, 7675118, 67181516, 718155492, 8798220008, 93512144280, 1080953807952
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