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例子
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三角形开始
1,
-1, 1,
1, -1, 1,
-1,0,0,1,
1, 2, -3, 2, 1,
-1, -5, 5, -5, 5, 1,
1, 9, 0, -5, 0, 9, 1,
-1, -14, -21, 35, -35, 21, 14, 1,
1, 20, 70, -56, 35, -56, 70, 20, 1,
-1, -27, -162, -42, 189, -189, 42, 162, 27, 1,
1, 35, 315, 510, -735, 693, -735, 510, 315, 35, 1
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