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A154094
Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 15.
0
22308, 168794, 505725, 1434840, 2268199, 4350854, 6106648, 6385418, 5120411
OFFSET
5,1
CROSSREFS
Sequence in context: A252774 A253042 A216202 * A206656 A329787 A224648
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved