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1, 1, 2, 6, 144, 720, 518400, 54432000, 121927680000, 23044331520000, 83623270219776000000, 32194959034613760000000, 15421436889514446422016000000000, 297710839152076388177018880000000000, 267015660792140704250415525396480000000000
(列表;图表;参考;听;历史;文本;内部格式)
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