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0, 18, 408, 2940, 12600, 40110, 105168, 240408, 496080, 945450, 1690920, 2870868, 4667208, 7313670, 11104800, 16405680, 23662368, 33413058, 46299960, 63081900, 84647640, 112029918, 146420208, 189184200, 241878000, 306265050, 384333768
(列表;图表;参考文献;听;历史;文本;内部格式)
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