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1, 1, 2, 4, 10, 28, 82, 255, 817, 2736, 9364, 32887, 117702, 429126, 1588138, 5956905, 22619993, 86823782, 336549149, 1316036640, 5188377504, 20605943013, 82394676296, 331529401307, 1341732208261, 5459350403375, 22324604170221, 91717955898433, 378460253610202, 1568052594398459, 6521808096528806
(列表;图表;参考;听;历史;文本;内部格式)
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