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1, 1, 1, 3, 10, 31, 98, 321, 1078, 3686, 12789, 44919, 159407, 570704, 2058817, 7476621, 27310345, 100275628, 369886451, 1370066394, 5093778398, 19002602171, 71109895075, 266855940177, 1004045604976, 3786790901401, 14313706230574, 54215799080454
(列表;图表;参考;听;历史;文本;内部格式)
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