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A068283
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1/4 the number of colorings of an n X n staggered hexagonal array with 4 colors.
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1
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1, 12, 264, 11424, 1009608, 185900256, 71883991272, 58646051219616, 101273697848025960, 370689919380760915680, 2880341312871966116331528, 47562687666338563715921774496
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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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