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A154074
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Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 9.
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0
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35, 159, 734, 695, 675, 1988, 1941, 881, 2067, 949, 707, 1003, 551
(list; graph; refs; listen; history; internal format)
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