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A154050
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 5.
0
0, 25, 72, 0, 28, 61, 0, 13, 43, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0, 27, 0, 0
OFFSET
5,2
COMMENTS
Pattern 0 0 27 starts at n=14 and continues through at least n=57.
EXAMPLE
Maximal zeros solution for n=16
.................0
................0.1
...............1.0.0
..............0.0.1.0
.............0.0.0.1.1
............1.0.0.1.0.0
...........0.1.1.0.0.0.0
..........0.1.0.0.1.0.0.1
.........1.0.0.0.0.1.1.0.0
........0.0.1.0.0.1.0.0.1.0
.......0.0.0.1.1.0.0.0.0.1.1
......1.0.0.1.0.0.1.0.0.1.0.0
.....0.1.1.0.0.0.0.1.1.0.0.0.0
....0.1.0.0.1.0.0.1.0.0.1.0.0.1
...1.0.0.0.0.1.1.0.0.0.0.1.1.0.0
..0.0.1.0.0.1.0.0.1.0.0.1.0.0.1.0
CROSSREFS
Sequence in context: A087239 A032653 A063308 * A182323 A255184 A235941
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved