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A068280 1/13 times the number of colorings of an n X n rhombic hexagonal array with 13 colors. 1
1, 1452, 214360212, 3217625521859892, 4910668309995799841810892, 762007921240709867578673020749884172, 12022427131636998562079732651101772918046821260092, 19285841951971298297383495940474744273219471204301574972512789012 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4.
LINKS
CROSSREFS
Sequence in context: A187992 A151722 A250148 * A020396 A052237 A031613
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
a(5)-a(8) from Alois P. Heinz, May 02 2012
STATUS
approved

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Last modified July 13 18:16 EDT 2024. Contains 374285 sequences. (Running on oeis4.)