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A152507
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1/5 of the number of permutations of 4 indistinguishable copies of 1..n with exactly 5 local maxima.
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1
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0, 0, 1268, 5299607, 8184246829, 8518545179048, 7375381060406666, 5823800163847281553, 4385124494281967244359, 3220844410144729325085834, 2335142573256061888321206228, 1681577911560502131835994578291, 1206702021031355908214429714812273
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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) \\ PeaksBySig defined in A334774.
a(n) = {PeaksBySig(vector(n, i, 4), [4])[1]/5} \\ 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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