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A147940
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Number of permutations of floor(i*8/7), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
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0
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1, 2, 6, 16, 54, 232, 936, 5070, 25700, 144538, 829398, 4949114, 30028194, 195791072, 1612860652, 13023036794
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