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A152515
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1/7 of the number of permutations of 6 indistinguishable copies of 1..n with exactly 4 local maxima.
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1
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0, 50, 321315, 824734660, 1615456263653, 2896390530019554, 5041787615373941503, 8691245890710074064416, 14935422227548071392068185, 25640373750597951750787951486, 44004685572828990924291145512563, 75515015253707870321041620455156412, 129585276023496655588712207028376849165
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OFFSET
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1,2
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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, 6), [3])[1]/7} \\ 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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