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1, 1, 3, 12, 44, 158, 564, 2010, 7160, 25502, 90828, 323490, 1152128, 4103366, 14614356, 52049802, 185378120, 660233966, 2351458140, 8374842354, 29827443344, 106232014742, 378350930916, 1347516822234, 4799252328536, 17092790630078
(列表;图表;参考;听;历史;文本;内部格式)
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