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A297385
Number of Eulerian cycles in the n X n torus grid graph.
2
2, 40, 8616, 15639936, 242230440480, 32098460087825856, 36433115190009846104160
OFFSET
1,1
COMMENTS
a(3) is also the number of Eulerian cycles in the 3 X 3 rook graph.
a(4) is also the number of Eulerian cycles in the 4-hypercube (tesseract) graph Q_4.
LINKS
Eric Weisstein's World of Mathematics, Eulerian Cycle
Eric Weisstein's World of Mathematics, Torus Grid Graph
CROSSREFS
Main diagonal of A298117.
Sequence in context: A162868 A059476 A306839 * A261429 A062769 A033841
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Dec 29 2017
EXTENSIONS
a(4)-a(7) from Andrew Howroyd, Jan 12 2018
a(1)-a(2) from Andrew Howroyd, Jan 12 2018
STATUS
approved