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5, 25, 110, 450, 1746, 6505, 23465, 82435, 283270, 955258, 3169520, 10368490, 33497790, 107028120, 338582738, 1061557195, 3301399385, 10191612315, 31250047480, 95226980516, 288523285450, 869559080385, 2607834545025, 7785230674580, 23142279699355
(列表;图表;参考;听;历史;文本;内部格式)
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