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A154089
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Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 13.
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0
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10296, 64397, 161040, 382854, 515649, 859348, 1018677, 822030, 546876, 304400, 132626, 47650, 14709, 8418, 4649, 4432, 2800, 3706, 2562, 3674, 2404, 2404, 2404, 2404
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