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A270228
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Number of matchings in the n X n rook graph K_n X K_n.
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9
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1, 7, 370, 270529, 3337807996, 855404716021831, 5352265402523357926168, 940288991338542314571521981185, 5236753179470435264288904589157765055760, 1029720447530443779943631183186535523331685533812231
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OFFSET
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1,2
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COMMENTS
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K_n X K_n is also called the rook graph or lattice graph.
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LINKS
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Eric Weisstein's World of Mathematics, Matching
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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