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1, 1, 6, 90, 2520, 113400, 7479361, 679851145, 81464937000, 12443633129640, 2360051647753800, 544135452733303200, 149883590538452902825, 48612505145280415315705, 18337020151083296373118050, 7959571454218402191668618850, 3939389912325851696444898536160
(列表;图表;参考;听;历史;文本;内部格式)
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