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1, 1, 5, 14, 39, 238, 915, 3532, 15165, 56094, 202714, 742339, 2571320, 8690976, 28962054, 93717076, 296850271, 923818730, 2815625489, 8428070046, 24812690100, 71831879744, 204732764217, 574966504528, 1591665305364, 4346329669253
(列表;图表;参考文献;听;历史;文本;内部格式)
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