从1开始的自然数按如图所示的规则排列现有一个三角形框架在图中上下或左右移动使每次恰有九个数在此三角形内则这九个数的和可以为 A Template




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tomski从1开始的自然数按如图所示的规则排列现有一个三角形框架在图中上下或左右移动使每次恰有九个数在此三角形内则这九个数的和可以为 a coloring