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A159730
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Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima.
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1
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0, 2, 15042, 18059184, 11195742340, 5293792219344, 2205450812336100, 861515212667884608, 324837276666570610668, 119915580982794765091280, 43656420088142545411963444, 15735834864508561392982184160, 5628506716816811122561964710428, 2000722502787397537117555256499248
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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, 4), [4])[1]} \\ Andrew Howroyd, May 14 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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