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A153926
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Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 3 ones in any 5 X 5 X 5 subtriangle.
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0
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1, 2, 2, 3, 5, 6, 12, 35, 83, 231, 918, 2132, 7575, 42734, 132320, 609928, 4694085, 18109624, 113969565, 1148801096, 6065910343, 51213901318
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OFFSET
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0,2
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LINKS
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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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