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A068247 1/6 the number of colorings of a 6x6 rhombic hexagonal array with n colors. 0
1, 123273728, 606966551329230, 42294602754348892160, 221621345837018832499375 (list; graph; refs; listen; history; internal format)
OFFSET

3,2

CROSSREFS

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

Sequence in context: A172845 A172888 A172917 * A180408 A050289 A204140

Adjacent sequences:  A068244 A068245 A068246 * A068248 A068249 A068250

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net), Feb 24 2002

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Last modified February 16 02:51 EST 2012. Contains 205860 sequences.