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1, 6, 26, 111, 331, 1276, 3576, 14301, 43401, 142626, 422526, 1501051, 4244551, 13621176, 41578676, 130893801, 378009301, 1188872926, 3428610426, 10769968551, 31120656051, 92887286676, 269920084176, 830429397301, 2353647784801
(列表;图表;参考文献;听;历史;文本;内部格式)
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