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A068244 1/6 the number of colorings of a 3 X 3 rhombic- or staggered- hexagonal array with n colors. 0
1, 176, 5490, 65600, 455875, 2239776, 8647716, 27962880, 78920325, 200002000, 464447126, 1003294656, 2039332295, 3935444800, 7261533000, 12884914176, 22089914121, 36733221360, 59442494650, 93866696000, 144987663051 (list; graph; refs; listen; history; internal format)
OFFSET

3,2

COMMENTS

Numbers for rhombic- and staggered- hexagonal arrays differ above 4 X 4.

CROSSREFS

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

Sequence in context: A133063 A077742 A027483 * A083961 A158818 A035829

Adjacent sequences:  A068241 A068242 A068243 * A068245 A068246 A068247

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 10:32 EST 2012. Contains 205904 sequences.