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A068278 1/11 the number of colorings of an n X n rhombic hexagonal array with 11 colors. 1
1, 810, 43047450, 150104969072730, 34342194186546625610730, 515520974797472540384088260118570, 507750044609844563320250272016778947097815370, 32812470510724769634930013386228840033573943730279978702970 (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: A156404 A282376 A203844 * A208189 A183216 A093633
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 March 3 06:28 EST 2024. Contains 370499 sequences. (Running on oeis4.)