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A152502
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1/12 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 5 local maxima.
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1
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0, 0, 1, 7274, 6251162, 2764274116, 897380159188, 247392790837624, 62200280199674352, 14820288466400312448, 3420153590479988396800, 774303834249035054901248, 173288568985609322651099136, 38513999874946087671220207616, 8524401267844398602674455314432
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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), [4])[1]/12} \\ 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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