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A120489
Number of nonisomorphic perfect 1-factorizations of complete bipartite graph K_{n,n}.
1
1, 1, 1, 0, 1, 0, 2, 0, 37, 0
OFFSET
0,7
COMMENTS
a(n) = 0 if n > 2 is even [Wanless].
REFERENCES
Barbara M. Maenhaut, Perfect 1-factorizations of complete and complete bipartite graphs, talk given at 31st Australasian Conf. Combin. Math and Combin. Computing, Alice Springs, 2006.
CROSSREFS
Cf. A120488.
Sequence in context: A193052 A347900 A337817 * A145576 A178235 A214447
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jul 22 2006
EXTENSIONS
Definition corrected by Ian Wanless, Apr 01 2008
STATUS
approved