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A068279 1/12 the number of colorings of an n X n rhombic hexagonal array with 12 colors. 1
1, 1100, 100001000, 751345249556000, 466550155917485654168000, 23943119027381359392048801885920000, 101551583948290437017941221055210389140843072000, 35597235390075660655078813076577627044739757882304090775296000 (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: A083933 A080317 A300560 * A278343 A277864 A278592

Adjacent sequences:  A068276 A068277 A068278 * A068280 A068281 A068282

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 April 7 04:20 EDT 2020. Contains 333292 sequences. (Running on oeis4.)