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A159723
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Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 local maxima.
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1
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0, 2, 924, 130672, 11798800, 882163680, 60299781248, 3933244436480, 249755233812480, 15590436752711680, 961617113393102848, 58776390094965178368, 3566492692755774439424, 215104023517101044006912, 12906638765341805641728000, 770965701556822810254376960
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OFFSET
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1,2
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LINKS
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PROG
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(PARI) \\ CircPeaksBySig defined in A334778.
a(n) = {CircPeaksBySig(vector(n, i, 3), [3])[1]} \\ Andrew Howroyd, May 13 2020
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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