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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

Table of n, a(n) for n=1..8.

CROSSREFS

Cf. A068239-A068305, A000332, A002417, A027441, A212162, A212163.

Sequence in context: A156404 A282376 A203844 * A208189 A183216 A093633

Adjacent sequences:  A068275 A068276 A068277 * A068279 A068280 A068281

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 October 28 03:58 EDT 2021. Contains 348313 sequences. (Running on oeis4.)