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A297387 Number of Eulerian cycles in the n-triangular grid graph. 1
1, 16, 4032, 15240192, 851527696384, 698020036891115520, 8357968487643562314301440, 1457789983634180266210347100143616, 3696916888496244614672984462362519120379904, 136132525681108593648158474136309868068849288394833920 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Eulerian Cycle.
Eric Weisstein's World of Mathematics, Triangular Grid Graph.
CROSSREFS
Cf. A334555.
Sequence in context: A367535 A222917 A060616 * A016936 A321242 A013721
KEYWORD
nonn,changed
AUTHOR
Eric W. Weisstein, Dec 29 2017
EXTENSIONS
a(5)-a(9) from Andrew Howroyd, Jan 11 2018
a(10) from Andrew Howroyd, Feb 18 2024
STATUS
approved

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Last modified February 27 21:03 EST 2024. Contains 370378 sequences. (Running on oeis4.)