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A159735 Number of permutations of 5 indistinguishable copies of 1..n arranged in a circle with exactly 3 local maxima. 1

%I #6 May 14 2020 16:57:48

%S 0,120,104160,43965760,14780546400,4552085003160,1344988823772440,

%T 387866444580875520,109997436597621865920,30801926079814805641600,

%U 8538476664330640027144320,2347317237607372501196513280,640818430658412951758052362240,173908317523621059703082725693440

%N Number of permutations of 5 indistinguishable copies of 1..n arranged in a circle with exactly 3 local maxima.

%H Andrew Howroyd, <a href="/A159735/b159735.txt">Table of n, a(n) for n = 1..200</a>

%o (PARI) \\ CircPeaksBySig defined in A334778.

%o a(n) = {CircPeaksBySig(vector(n, i, 5), [3])[1]} \\ _Andrew Howroyd_, May 14 2020

%Y Cf. A159733, A159734, A334778.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 20 2009

%E Terms a(7) and beyond from _Andrew Howroyd_, May 14 2020

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Last modified June 17 03:01 EDT 2024. Contains 373432 sequences. (Running on oeis4.)