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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

Eric Weisstein's World of Mathematics, Eulerian Cycle

Eric Weisstein's World of Mathematics, Triangular Grid Graph

CROSSREFS

Sequence in context: A087519 A222917 A060616 * A016936 A321242 A013721

Adjacent sequences:  A297384 A297385 A297386 * A297388 A297389 A297390

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Dec 29 2017

EXTENSIONS

a(5)-a(9) from Andrew Howroyd, Jan 11 2018

STATUS

approved

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Last modified October 6 15:48 EDT 2022. Contains 357269 sequences. (Running on oeis4.)