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2, 5, 16, 59, 244, 1112, 5516, 29505, 168938, 1029271, 6639768, 45162696, 322739878, 2415567889, 18884022724, 153826198419, 1302844673004, 11451006297332, 104262283711688, 981877752182053, 9550121928456718, 95809651792320751, 990221394289370920
(列表;图表;参考文献;听;历史;文本;内部格式)
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