A152502 1/12 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 5 local maxima.
0, 0, 1, 7274, 6251162, 2764274116, 897380159188, 247392790837624, 62200280199674352, 14820288466400312448, 3420153590479988396800, 774303834249035054901248, 173288568985609322651099136, 38513999874946087671220207616, 8524401267844398602674455314432
Offset: 1
Keywords
Links
- Andrew Howroyd, Table of n, a(n) for n = 1..200
Programs
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PARI
\\ PeaksBySig defined in A334774. a(n) = {PeaksBySig(vector(n,i,3), [4])[1]/12} \\ Andrew Howroyd, May 12 2020
Extensions
Terms a(9) and beyond from Andrew Howroyd, May 12 2020