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A147726
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Number of permutations of 1..n with all sums of 2 through 4 adjacent terms respectively unique.
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0
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1, 2, 6, 16, 54, 232, 936, 3880, 17302, 81584, 425550, 2332858, 13639774, 84416970, 555549406, 3834425860, 27937916790
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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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