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A068292
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1/18 times the number of colorings of an n X n staggered hexagonal array with 18 colors.
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1
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1, 4352, 4294971392, 961201829493850112, 48781126844255370222607142912, 561399464545957024370182236743498291167232, 1465126373454769055363011684465705776628549543645731295232, 867083863998912174882104147806181674429733314821142479758142332970286825472
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OFFSET
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1,2
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COMMENTS
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Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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