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A154041
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Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 4 X 4 X 4 subtriangle summing to 4.
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0
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27, 96, 52, 70, 23, 27, 16, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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COMMENTS
| Value 8 starts at n=12 and continues through at least n=60.
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EXAMPLE
| Maximal zeros solution for n=12
.............2
............0.0
...........0.2.0
..........0.0.0.0
.........0.0.2.0.0
........2.0.0.0.0.2
.......0.0.0.2.0.0.0
......0.2.0.0.0.0.2.0
.....0.0.0.0.2.0.0.0.0
....0.0.2.0.0.0.0.2.0.0
...2.0.0.0.0.2.0.0.0.0.2
..0.0.0.2.0.0.0.0.2.0.0.0
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CROSSREFS
| Sequence in context: A101100 A078183 A072252 * A118615 A197619 A033659
Adjacent sequences: A154038 A154039 A154040 * A154042 A154043 A154044
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net) Jan 04 2009
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