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A287230 Number of matchings in the n-triangular honeycomb acute knight graph. 4
1, 1, 8, 64, 1331, 64000, 6400075, 1404928000, 677298787768, 712186032947200, 1635557819719974912, 8209592592625295700893, 90036881979773511965369428, 2157454308508779392217680572439 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
Stan Wagon, Graph Theory Problems from Hexagonal and Traditional Chess, The College Mathematics Journal, Vol. 45, No. 4, September 2014, pp. 278-287.
Eric Weisstein's World of Mathematics, Independent Edge Set
Eric Weisstein's World of Mathematics, Matching
CROSSREFS
Sequence in context: A111984 A352721 A278145 * A154710 A069033 A087337
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, May 22 2017
EXTENSIONS
a(11) from Eric W. Weisstein, Jun 25 2017
a(12)-a(14) from Andrew Howroyd, Jul 17 2017
STATUS
approved

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)