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A153956
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Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 7 ones in any 5 X 5 X 5 subtriangle.
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0
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1, 2, 2, 4, 14, 16, 62, 400, 1312, 8228, 101575, 539692, 5945952, 128078527, 1209629759, 22708191479, 862913200941
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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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