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A147920
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Number of permutations of floor(i*7/3), i=0..n-1, with all sums of two adjacent terms unique.
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0
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1, 2, 6, 24, 74, 368, 2434, 12876, 95120, 838244, 6232926, 59671520, 674514660, 6450680100, 77573342320, 1056425822904
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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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