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A068280
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1/13 times the number of colorings of an n X n rhombic hexagonal array with 13 colors.
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1
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1, 1452, 214360212, 3217625521859892, 4910668309995799841810892, 762007921240709867578673020749884172, 12022427131636998562079732651101772918046821260092, 19285841951971298297383495940474744273219471204301574972512789012
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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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