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1, 1, 2, 5, 14, 40, 118, 349, 1042, 3112, 9322, 27926, 83738, 251096, 753170, 2259161, 6777134, 20330360, 60990038, 182967002, 548897894, 1646684360, 4940043758, 14820103348, 44460282118, 133380762616, 400142204110, 1200426361234, 3601278832606, 10803835744648
(列表;图表;参考文献;听;历史;文本;内部格式)
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