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A147912
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Number of permutations of floor(i*7/4), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
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0
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1, 2, 6, 24, 96, 456, 2134, 11650, 74546, 530962, 3285816, 22665948, 187716490, 1693665742, 13845532508, 121701474366
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