A152503 1/8 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 6 local maxima.
0, 0, 0, 925, 5134608, 7080780596, 5503883684118, 3175651343215500, 1543855504958661492, 676391857775294288488, 277604477433374392213008, 109265969423431070616562496, 41856404659462959845867172864, 15752452465692536904424614273024, 5860017184412283112523269770190848
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), [5])[1]/8} \\ Andrew Howroyd, May 12 2020
Extensions
Terms a(9) and beyond from Andrew Howroyd, May 12 2020