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A068294
1/5 the number of colorings of an n X n octagonal array with 5 colors.
1
1, 24, 1344, 187008, 65012352, 56638464768, 123968096842368, 682463815024774272, 9455897825697924931968, 329835949030491781985964672, 28967729014957963606903092579840, 6405563550899359667890368716213003520, 3566277295414164369700428069692324488565760, 4998812913455162820842387241261713638306330756608
OFFSET
1,2
LINKS
Christian Gaetz and Yibo Gao, Interlacing triangles, Schubert puzzles, and graph colorings, arXiv:2408.07863 [math.CO], 2024. See p. 15.
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
a(8) from Alois P. Heinz, May 03 2012
a(9)-a(14) from Andrew Howroyd, Jun 25 2017
STATUS
approved