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A154051
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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 5.
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0
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144, 321, 322, 328, 186, 123, 89, 49, 37, 31, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,1
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COMMENTS
| Value 27 starts at n=15 and continues through at least n=60.
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EXAMPLE
| Maximal zeros solution for n=15
................2
...............0.0
..............0.2.0
.............0.0.0.0
............0.0.1.0.0
...........0.0.1.1.0.0
..........2.0.0.0.0.0.2
.........0.0.0.1.1.0.0.0
........0.2.0.0.0.0.0.2.0
.......0.0.0.0.1.1.0.0.0.0
......0.0.1.0.0.1.0.0.1.0.0
.....0.0.1.1.0.0.0.0.1.1.0.0
....2.0.0.0.0.0.2.0.0.0.0.0.2
...0.0.0.1.1.0.0.0.0.1.1.0.0.0
..0.2.0.0.0.0.0.2.0.0.0.0.0.2.0
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CROSSREFS
| Sequence in context: A008436 A134341 A125841 * A030633 A189988 A034285
Adjacent sequences: A154048 A154049 A154050 * A154052 A154053 A154054
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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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