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1, 2, 2, 5, 8, 20, 30, 69, 115, 270, 459, 1036, 1754, 4027, 6812, 15447, 26770, 60187, 105107, 234944, 413964, 921296, 1633724, 3610032, 6458525, 14220580, 25556634, 56006901, 101271220, 220941515, 401379967, 872910068, 1592208078, 3452735767, 6321260916, 13659455014
(列表;图表;参考文献;听;历史;文本;内部格式)
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