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A153565
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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 5 X 5 X 5 subtriangle.
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0
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1, 2, 8, 42, 176, 576, 5196, 73620, 1358751, 28558756, 692751617, 26643595004, 1466710451867, 108327240281718, 10438694555033407
(list; graph; refs; listen; history; internal format)
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