Journal of Integer Sequences, Vol. 18 (2015), Article 15.6.8

Ménage Numbers and Ménage Permutations


Yiting Li
Department of Mathematics
Brandeis University
415 South Street
Waltham, MA 02453
USA

Abstract:

In this paper, we study the combinatorial structures of straight and ordinary ménage permutations. Based on these structures, we prove four formulas. The first two formulas define a relationship between the ménage numbers and the Catalan numbers. The other two formulas count the ménage permutations by number of cycles.


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(Concerned with sequences A000108 A000179 and A000271.)


Received January 16 2015; revised versions received February 21 2015; June 11 2015; June 15 2015. Published in Journal of Integer Sequences, June 16 2015.


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