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谜题/简单级数 4/解答
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来自维基教科书，面向开放世界的开放书籍
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谜题
交替地从 1 开始递减和递增数位，每次增量都在增加 1。
3,2,4,1,5,0,6,-1,7,...
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书籍:谜题
华夏公益教科书
