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A154060
Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 6.
0
15, 48, 136, 132, 79, 180, 173, 60, 137, 52, 50, 22, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48
OFFSET
5,1
COMMENTS
Pattern 48 48 48 48 20 starts at n=17 and continues through at least n=53.
CROSSREFS
Sequence in context: A065906 A370912 A377521 * A168305 A208155 A228219
KEYWORD
nonn,more,changed
AUTHOR
R. H. Hardin, Jan 04 2009
STATUS
approved