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0, 3, 15, 60, 218, 742, 2421, 7676, 23848, 72928, 220265, 658616, 1953057, 5751374, 16836460, 49035261, 142177768, 410634197, 1181879444, 3391163718, 9703303908, 27695130424, 78868082615, 224130479264, 635738931116, 1800122483435
(列表;图表;参考;听;历史;文本;内部格式)
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