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A120489
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Number of nonisomorphic perfect 1-factorizations of complete bipartite graph K_{n,n}.
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1
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OFFSET
| 0,7
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COMMENTS
| a(n) = 0 if n > 2 is even [Wanless].
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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
I. M. Wanless, Perfect factorisations of bipartite graphs and Latin squares without proper subrectangles, Electron. J. Combin. 6 (1999) R9.
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CROSSREFS
| Cf. A120488.
Sequence in context: A009548 A172388 A193052 * A145576 A012445 A012450
Adjacent sequences: A120486 A120487 A120488 * A120490 A120491 A120492
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jul 22 2006
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EXTENSIONS
| Definition corrected by Ian Wanless, Apr 01 2008
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