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A253107 Number of Eulerian cycles in a lattice graph bounded by the eight equations x+y=-2n, x+y=2n, x-y=-2n, x-y=2n, x=1-2n, x=2n-1, y=1-2n, and y=2n-1 (Aztec Diamond graph). 1
1, 40, 132160, 33565612800, 641149227424067584, 911979417737022109612195840, 96089134887576552087085389330051891200, 747578503218020593242369202628724536730457230016512 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

P. Audibert, Mathematics for Informatics and Computer Science, Wiley, 2010, p. 832.

Muhammad Kholilurrohman and Shin-ichi Minato, An Efficient Algorithm for Enumerating Eulerian Paths, Hokkaido University, Division of Computer Science, TCS Technical Reports, TCS-TR-A-14-77, Oct. 2014.

Eric Weisstein's World of Mathematics, Eulerian Cycle

CROSSREFS

Sequence in context: A223103 A186166 A151605 * A300842 A159428 A115482

Adjacent sequences:  A253104 A253105 A253106 * A253108 A253109 A253110

KEYWORD

nonn

AUTHOR

Muhammad Kholilurrohman, Dec 26 2014

STATUS

approved

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Last modified August 13 06:22 EDT 2020. Contains 336442 sequences. (Running on oeis4.)