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A147938
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Number of permutations of floor(i*7/5), 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, 24, 74, 372, 1764, 9076, 51988, 292392, 2059488, 14021462, 105081158, 851532252, 6805717470, 64732937542
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