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1, 1, 2, 6, 24, 24, 144, 1008, 8064, 72576, 72576, 798336, 9580032, 124540416, 1743565824, 1743565824, 27897053184, 474249904128, 8536498274304, 162193467211776, 162193467211776, 3406062811447296, 74933381851840512, 1723467782592331776, 41363226782215962624, 41363226782215962624
(列表;图表;参考文献;听;历史;文本;内部格式)
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