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4, 8, 26, 78, 246, 762, 2370, 7372, 22916, 71264, 221580, 688986, 2142340, 6661388, 20712972, 64404986, 200261174, 622693012, 1936204472, 6020443090, 18719993212, 58208032550, 180992322576, 562778355430, 1749905592014, 5441164449786
(列表;图表;参考文献;听;历史;文本;内部格式)
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