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A159726
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Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 6 local maxima.
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1
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0, 0, 0, 1256, 24483200, 55067152128, 57615626479712, 41069543783239872, 23516539818144774912, 11776285299306762639680, 5412720242324956991133440, 2351154988094363114287766016, 983075755980176565659196488192, 400400884398187607904444939190272
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OFFSET
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1,4
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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), [6])[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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