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Search: id:A154072
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| A154072 |
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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 4 X 4 X 4 subtriangle summing to 9. |
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1
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| 20, 60, 123, 304, 180, 208, 509, 248, 136, 220, 132, 58, 42, 78
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