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A153552
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Number of planar n X n X n binary triangular grids with no more than 3 ones in any similarly oriented 3 X 3 X 3 subtriangle.
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0
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1, 2, 8, 42, 430, 7658, 225975, 11631356, 1030701814, 156452829412, 40873817468453, 18360567911334693, 14174054613503947291, 18811898207306698915955, 42921569361133279517141175
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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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