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A159724
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Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima.
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1
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0, 0, 144, 174216, 57255120, 11991842928, 2031699317760, 307822441390848, 43794222405754752, 6002662060069524480, 803884492717330692096, 106029178904806181240832, 13837293346888202240065536, 1791753662455712320172064768, 230600676245973342632159477760
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OFFSET
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1,3
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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), [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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