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A147901
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Number of permutations of floor(i*5/2), 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, 16, 74, 368, 1924, 10496, 65446, 426596, 3097668, 23660988, 200784060, 1772606976, 16992756584, 168890555040
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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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