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A147891
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Number of permutations of floor(i*9/8), i=0..n-1, with all sums of two adjacent terms unique.
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0
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1, 2, 6, 16, 54, 232, 1132, 6024, 45310, 336372, 2763524, 23390652, 212922998, 2023344980, 20591028914, 219965702000
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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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