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1, 1, 2, 3, 12, 5, 60, 35, 280, 63, 2520, 77, 27720, 1287, 8008, 6435, 720720, 2431, 12252240, 46189, 3695120, 440895, 232792560, 96577, 1070845776, 3900225, 2974571600, 5014575, 80313433200, 215441, 2329089562800, 31556720475
(列表;图表;参考文献;听;历史;文本;内部格式)
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