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A153992
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Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 10 ones in any 5 X 5 X 5 subtriangle.
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0
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1, 2, 4, 16, 64, 447, 3366, 48406, 708304, 19960973, 570218721, 31360806160, 1749984725579, 187910820807765, 20470104106684190, 4283194032962518137
(list; graph; refs; listen; history; internal format)
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