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1, 4, 13, 36, 90, 208, 455, 948, 1901, 3688, 6955, 12792, 23019, 40612, 70395, 120072, 201822, 334684, 548158, 887500, 1421602, 2254460, 3541928, 5515900, 8519173, 13055208, 19859113, 29998024, 45012751, 67116436, 99472320, 146580028, 214811311, 313149460
(列表;图表;参考;听;历史;文本;内部格式)
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