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0, 0, 1, 6, 45, 435, 5250, 76608, 1316574, 26100000, 587030895, 14780620800, 412069511139, 12604714327296, 419801484375000, 15123782440058880, 586049426860524300, 24307340986526810112, 1074495780444130114509, 50429952000000000000000
(列表;图表;参考;听;历史;文本;内部格式)
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