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A152337
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Number of permutations of floor(i*5/4), i=0..n-1, with all sums of 4 adjacent terms unique.
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0
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1, 2, 6, 24, 120, 640, 3924, 25536, 205708, 1739900, 16259796, 161820114, 1804403590, 21159038910, 264205593296, 3464634505962
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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