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A180072
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Number of permutations of 1..n with the sum of squared adjacent differences <= (n-1)*n*(n+1)/6.
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1
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2, 2, 12, 62, 384, 2574, 20432, 183790, 1833102, 20075568, 240972780, 3128714960, 43794182164, 656192916356, 10493589363960, 178319646743428
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OFFSET
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2,1
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LINKS
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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