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A154058
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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 6.
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0
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77, 419, 263, 565, 252, 422, 79, 74, 15, 21, 11, 11, 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=16 and continues through at least n=60.
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EXAMPLE
| Maximal zeros solution for n=16
.................3
................0.0
...............0.3.0
..............0.0.0.0
.............0.0.3.0.0
............3.0.0.0.0.3
...........0.0.0.3.0.0.0
..........0.3.0.0.0.0.3.0
.........0.0.0.0.3.0.0.0.0
........0.0.3.0.0.0.0.3.0.0
.......3.0.0.0.0.3.0.0.0.0.3
......0.0.0.3.0.0.0.0.3.0.0.0
.....0.3.0.0.0.0.3.0.0.0.0.3.0
....0.0.0.0.3.0.0.0.0.3.0.0.0.0
...0.0.3.0.0.0.0.3.0.0.0.0.3.0.0
..3.0.0.0.0.3.0.0.0.0.3.0.0.0.0.3
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CROSSREFS
| Sequence in context: A158771 A020206 A020304 * A027574 A059047 A046149
Adjacent sequences: A154055 A154056 A154057 * A154059 A154060 A154061
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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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