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1, -6, 60, -504, 2160, -3168, 786240, -51840, 1762560, -82736640, 1437004800, -858470400, 101896704000, -1881169920, 8659353600, -855305256960, 14071151001600, -150493593600, 8252165711462400, -70431001804800, 24434139856896000, -1076294062964736000
(列表;图表;参考;听;历史;文本;内部格式)
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