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A154082
Number of planar triangular n X n X n nonnegative integer grids symmetric both under 120 degree rotation and reflection with every similarly oriented 5 X 5 X 5 subtriangle summing to 10.
0
0, 25, 47, 0, 15, 26, 0, 5, 12, 0, 1, 14, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0
OFFSET
5,2
COMMENTS
Pattern 0 0 10 starts at n=17 and continues through at least n=53.
EXAMPLE
Maximal zeros solution for n=19
....................2
...................0.0
..................0.2.0
.................2.0.0.2
................0.0.2.0.0
...............0.2.0.0.2.0
..............2.0.0.2.0.0.2
.............0.0.2.0.0.2.0.0
............0.2.0.0.2.0.0.2.0
...........2.0.0.2.0.0.2.0.0.2
..........0.0.2.0.0.2.0.0.2.0.0
.........0.2.0.0.2.0.0.2.0.0.2.0
........2.0.0.2.0.0.2.0.0.2.0.0.2
.......0.0.2.0.0.2.0.0.2.0.0.2.0.0
......0.2.0.0.2.0.0.2.0.0.2.0.0.2.0
.....2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2
....0.0.2.0.0.2.0.0.2.0.0.2.0.0.2.0.0
...0.2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2.0
..2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2
CROSSREFS
Sequence in context: A038811 A028505 A367496 * A216869 A143278 A106632
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved