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A152501
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1/8 the number of permutations of 3 indistinguishable copies of 1..n with exactly 4 local maxima.
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1
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0, 0, 46, 22615, 5036741, 819235874, 114962084772, 14974498962192, 1876234090571968, 230313563301166336, 27966954502164518912, 3376705184454377873408, 406486565581361073979392, 48857132166440216820449280, 5867654791849010140880306176, 704409107074292841154786361344
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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, 3), [3])[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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