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A147896
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Number of permutations of floor(i*7/6), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
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0
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1, 2, 6, 16, 54, 232, 1194, 5850, 32514, 186512, 1126380, 7192530, 59572866, 496249216, 4342242234, 38902467388
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