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A153470
1/7 of the number of 7-colorings of a planar n X n X n triangular grid.
1
1, 30, 3750, 1953750, 4242798750, 38404604583750, 1448977637979903750, 227870224522898915943750, 149369176223578379939728893750, 408114381491174443782294469248048750, 4647830909678374872940213803359098309308750
OFFSET
1,2
CROSSREFS
7th row of A182797/7.
Sequence in context: A115465 A152131 A159993 * A289247 A275049 A127849
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 27 2008
EXTENSIONS
a(8)-a(11) from Alois P. Heinz, Dec 03 2010
STATUS
approved