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A154071
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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 8.
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0
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990, 3472, 5217, 7165, 5966, 5372, 3621, 1629, 738, 448, 184, 109, 100, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,1
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COMMENTS
| Value 87 starts at n=18 and continues through at least n=52.
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EXAMPLE
| Maximal zeros solution for n=18
...................0
..................1.1
.................0.3.0
................0.0.0.0
...............0.0.3.0.0
..............1.0.0.0.0.1
.............2.0.0.2.0.0.2
............0.1.0.1.1.0.1.0
...........0.2.0.0.1.0.0.2.0
..........0.0.1.0.1.1.0.1.0.0
.........0.0.2.0.0.1.0.0.2.0.0
........2.0.0.1.0.1.1.0.1.0.0.2
.......1.1.0.1.0.0.2.0.0.1.0.1.1
......0.0.0.1.2.0.0.0.0.2.1.0.0.0
.....0.2.1.0.0.0.0.3.0.0.0.0.1.2.0
....0.0.0.0.1.2.0.0.0.0.2.1.0.0.0.0
...1.0.2.1.0.0.0.0.3.0.0.0.0.1.2.0.1
..1.1.0.0.0.1.2.0.0.0.0.2.1.0.0.0.1.1
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CROSSREFS
| Sequence in context: A045733 A057668 A087702 * A068301 A119095 A119077
Adjacent sequences: A154068 A154069 A154070 * A154072 A154073 A154074
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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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