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A159724 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima. 1
0, 0, 144, 174216, 57255120, 11991842928, 2031699317760, 307822441390848, 43794222405754752, 6002662060069524480, 803884492717330692096, 106029178904806181240832, 13837293346888202240065536, 1791753662455712320172064768, 230600676245973342632159477760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..200

PROG

(PARI) \\ CircPeaksBySig defined in A334778.

a(n) = {CircPeaksBySig(vector(n, i, 3), [4])[1]} \\ Andrew Howroyd, May 14 2020

CROSSREFS

Cf. A159721, A159722, A334778.

Sequence in context: A217339 A231827 A203098 * A221124 A008700 A047807

Adjacent sequences:  A159721 A159722 A159723 * A159725 A159726 A159727

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 20 2009

EXTENSIONS

Terms a(8) and beyond from Andrew Howroyd, May 14 2020

STATUS

approved

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Last modified June 25 12:55 EDT 2022. Contains 354851 sequences. (Running on oeis4.)