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A159728 Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 2 local maxima. 0
36, 2610, 129800, 5748750, 241987500, 9885006250 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

CROSSREFS

Sequence in context: A120466 A202633 A198639 * A004706 A061844 A036510

Adjacent sequences:  A159725 A159726 A159727 * A159729 A159730 A159731

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Apr 20 2009

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Last modified February 16 06:46 EST 2012. Contains 205867 sequences.