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A068284 1/5 the number of colorings of an n X n staggered hexagonal array with 5 colors. 1
1, 36, 6588, 6169500, 29609340804, 728465439240612, 91873868538291559236, 59398217444060775978706980, 196856852524443536659406407297548 (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..9.

CROSSREFS

Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195.

Sequence in context: A268554 A326999 A068272 * A145248 A222974 A013739

Adjacent sequences:  A068281 A068282 A068283 * A068285 A068286 A068287

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 24 2002

EXTENSIONS

a(8)-a(9) from Alois P. Heinz, May 03 2012

STATUS

approved

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Last modified November 12 09:29 EST 2019. Contains 329054 sequences. (Running on oeis4.)