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A152503
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1/8 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 6 local maxima.
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1
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0, 0, 0, 925, 5134608, 7080780596, 5503883684118, 3175651343215500, 1543855504958661492, 676391857775294288488, 277604477433374392213008, 109265969423431070616562496, 41856404659462959845867172864, 15752452465692536904424614273024, 5860017184412283112523269770190848
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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) \\ PeaksBySig defined in A334774.
a(n) = {PeaksBySig(vector(n, i, 3), [5])[1]/8} \\ Andrew Howroyd, May 12 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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