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A147886
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Number of permutations of floor(i*5/4), i=0..n-1, with all sums of two adjacent terms unique.
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0
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1, 2, 6, 16, 74, 304, 1720, 9344, 67650, 496204, 4034008, 33768568, 337582870, 3472186528, 37790639750, 425218900656
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