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0, 0, 0, 0, 0, 3, 9, 23, 65, 186, 507, 1380, 3764, 10270, 28001, 76568, 209749, 575900, 1584769, 4371279, 12083764, 33477190, 92939305, 258537475, 720575302, 2012021934, 5627886815, 15768237664, 44249863373, 124365487416, 350038837208, 986579529425
(列表;图表;参考;听;历史;文本;内部格式)
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