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A154052
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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 5 X 5 X 5 subtriangle summing to 5.
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0
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0, 5, 8, 0, 2, 3, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0
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OFFSET
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5,2
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COMMENTS
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Pattern 1 0 0 starts at n=13 and continues through at least n=60.
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LINKS
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Table of n, a(n) for n=5..60.
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EXAMPLE
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Maximal zeros solution for n=13
..............1
.............0.0
............0.1.0
...........1.0.0.1
..........0.0.1.0.0
.........0.1.0.0.1.0
........1.0.0.1.0.0.1
.......0.0.1.0.0.1.0.0
......0.1.0.0.1.0.0.1.0
.....1.0.0.1.0.0.1.0.0.1
....0.0.1.0.0.1.0.0.1.0.0
...0.1.0.0.1.0.0.1.0.0.1.0
..1.0.0.1.0.0.1.0.0.1.0.0.1
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CROSSREFS
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Sequence in context: A090817 A198875 A201756 * A181439 A011496 A198360
Adjacent sequences: A154049 A154050 A154051 * A154053 A154054 A154055
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Jan 04 2009
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STATUS
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approved
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