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1, 2, 6, 3, 9, 15, 4, 12, 20, 28, 5, 15, 25, 35, 45, 6, 18, 30, 42, 54, 66, 7, 21, 35, 49, 63, 77, 91, 8, 24, 40, 56, 72, 88, 104, 120, 9, 27, 45, 63, 81, 99, 117, 135, 153, 10, 30, 50, 70, 90, 110, 130, 150, 170, 190, 11, 33, 55, 77, 99, 121, 143, 165, 187, 209, 231, 12
(列表;桌子;图表;参考;听;历史;文本;内部格式)
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