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Search: id:A154090
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| A154090 |
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Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 14. |
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+0
1
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OFFSET
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5,2
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EXAMPLE
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Maximal zeros solution for n=12
.............0
............0.2
...........6.4.0
..........0.0.0.0
.........0.0.0.0.2
........0.0.0.0.4.2
.......2.0.0.2.4.0.0
......2.4.4.0.0.0.0.0
.....0.0.0.2.0.2.0.0.0
....0.0.0.0.0.4.0.0.0.6
...2.4.0.0.0.0.4.0.0.4.0
..0.0.6.0.0.0.2.2.0.0.2.0
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CROSSREFS
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Sequence in context: A045258 A038658 A065700 this_sequence A048791 A093943 A129313
Adjacent sequences: A154087 A154088 A154089 this_sequence A154091 A154092 A154093
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net) Jan 04 2009
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