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A147925
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Number of permutations of floor(i*4/3), 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, 24, 74, 312, 1620, 7876, 44022, 307314, 2064562, 15229866, 132064084, 1095500280, 10006003984, 104500649736
(list; graph; refs; listen; history; internal format)
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