ménage number

ménage number

[mā′näzh ‚nəm·bər]
(mathematics)
One of the numbers Mn that count the number of ways, once n wives are seated in alternate seats about a circular table, that their husbands can be seated in the seats between them so that no husband sits next to his wife.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.