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0, 4, 18, 50, 166, 474, 1478, 4330, 13206, 39194, 118438, 353610, 1064246, 3185914, 9571398, 28686890, 86115286, 258236634, 774928358, 2324348170, 6973918326, 20920007354, 62763517318, 188283561450, 564864665366, 1694566034074
(列表;图表;参考文献;听;历史;文本;内部格式)
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