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A153924
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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 3 ones in any 4 X 4 X 4 subtriangle.
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0
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1, 2, 50178, 330289, 4142724, 38758787, 721406196, 10013654728, 271477291887, 5511387919570, 217444939703686, 6427549653424203, 370935313492909781
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