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A154048
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Number of planar triangular n X n X n nonnegative integer grids symmetric both under 120 degree rotation and reflection with every similarly oriented 4 X 4 X 4 subtriangle summing to 5.
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0
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2, 6, 3, 5, 1, 6, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1
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OFFSET
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4,1
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COMMENTS
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Pattern 1 4 1 2 starts at n=10 and continues through at least n=60.
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LINKS
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EXAMPLE
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Maximal zeros solution for n=10
...........1
..........1.1
.........0.0.0
........0.1.1.0
.......1.0.1.0.1
......1.1.0.0.1.1
.....0.0.0.2.0.0.0
....0.1.1.0.0.1.1.0
...1.0.1.0.1.0.1.0.1
..1.1.0.0.1.1.0.0.1.1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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