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A154077
Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 4 X 4 X 4 subtriangle summing to 10.
0
20, 87, 176, 369, 327, 477, 649, 644, 519, 410, 420, 461
OFFSET
4,1
CROSSREFS
Sequence in context: A205312 A268888 A211158 * A027849 A243645 A219824
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved