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A068276
1/9 the number of colorings of an n X n rhombic hexagonal array with 9 colors.
1
1, 392, 5765144, 3181273031384, 65865666949993359176, 51166369594150205333793355592, 1491342760953091009621584639091222226600, 1630938910749494351643174313469316936138973479205208
OFFSET
1,2
COMMENTS
Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4.
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
a(6)-a(8) from Alois P. Heinz, May 02 2012
STATUS
approved