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A270228 Number of matchings in the n X n rook graph K_n X K_n. 9
1, 7, 370, 270529, 3337807996, 855404716021831, 5352265402523357926168, 940288991338542314571521981185, 5236753179470435264288904589157765055760, 1029720447530443779943631183186535523331685533812231 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
K_n X K_n is also called the rook graph or lattice graph.
LINKS
Eric Weisstein's World of Mathematics, Independent Edge Set
Eric Weisstein's World of Mathematics, Matching
Eric Weisstein's World of Mathematics, Rook Graph
CROSSREFS
Cf. A270227, A270229, A085537 (Wiener index), A002720 (independent vertex sets), A269561, A028420.
Sequence in context: A221353 A222870 A270247 * A082443 A082624 A332137
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Mar 13 2016
STATUS
approved

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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)