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0, 0, 1, -3, 9, -30, 107, -357, 492, 11520, -234440, 3556520, -51373780, 750804600, -11349186700, 179062886100, -2959725476000, 51309772966400, -932811192037200, 17769951660870000, -354309379544446000, 7384407204701604000, -160652936843547018000
(列表;图表;参考;听;历史;文本;内部格式)
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