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A114939
Number of essentially different seating arrangements for n couples around a circular table with 2*n seats avoiding spouses being neighbors and avoiding clusters of 3 persons with equal gender.
+0
4
0, 1, 7, 216, 10956, 803400, 83003040, 11579823360, 2080493573760, 469031859192960, 129727461014726400, 43176116371928601600, 17025803126147196057600, 7850538273249476117913600
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.
AT&T Labs Research
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