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A154035
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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 5 X 5 X 5 subtriangle summing to 3.
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0
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28, 42, 30, 16, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,1
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COMMENTS
| Value 1 starts at n=11 and continues through at least n=60.
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EXAMPLE
| Maximal zeros solution for n=11
............1
...........0.0
..........0.1.0
.........0.0.0.0
........0.0.1.0.0
.......1.0.0.0.0.1
......0.0.0.1.0.0.0
.....0.1.0.0.0.0.1.0
....0.0.0.0.1.0.0.0.0
...0.0.1.0.0.0.0.1.0.0
..1.0.0.0.0.1.0.0.0.0.1
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CROSSREFS
| Sequence in context: A184032 A047630 A135789 * A025368 A025359 A056031
Adjacent sequences: A154032 A154033 A154034 * A154036 A154037 A154038
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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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