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A220904
Number of equivalence classes of perfect matchings in the n-cube.
1
1, 1, 2, 8, 336, 356788059, 607158046495120886820621
OFFSET
1,3
LINKS
N. Graham and F. Harary, The number of perfect matchings in a hypercube, Appl. Math. Lett., 1 (1988), 45-48.
Patric R. J. Östergård and V. H. Pettersson, Enumerating Perfect Matchings in n-Cubes, Order, November 2013, Volume 30, Issue 3, pp 821-835.
CROSSREFS
Cf. A005271.
Sequence in context: A013003 A009707 A013176 * A009489 A102597 A009836
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 01 2013
STATUS
approved