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1, 1, 1, 4, 4, 24, 24, 192, 1728, 17280, 17280, 207360, 207360, 414720, 6220800, 99532800, 696729600, 12541132800, 12541132800, 250822656000, 5267275776000, 10534551552000, 10534551552000, 252829237248000, 1264146186240000, 12641461862400000, 3754514173132800000
(列表;图表;参考;听;历史;文本;内部格式)
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