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A287225 Number of matchings in the n X n knight graph. 2
1, 1, 47, 8617, 4437215, 18283403428, 478131755555352, 65146261730656227552, 51516890628947512147926356, 244151636345172523021724077440553, 6697138334086551576618194527162685383161 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..11.

Eric Weisstein's World of Mathematics, Independent Edge Set

Eric Weisstein's World of Mathematics, Knight Graph

Eric Weisstein's World of Mathematics, Matching

CROSSREFS

Row sums of A302241.

Cf. A289200, A289202, A141243.

Sequence in context: A141797 A101629 A267063 * A033520 A210818 A093940

Adjacent sequences:  A287222 A287223 A287224 * A287226 A287227 A287228

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, May 22 2017

EXTENSIONS

a(7)-a(11) from Andrew Howroyd, Jul 01 2017

STATUS

approved

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Last modified June 4 11:32 EDT 2020. Contains 334825 sequences. (Running on oeis4.)