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1, 1, 2, 0, 0, 0, 360, 2520, 20160, 120960, 1209600, 13305600, 179625600, 2335132800, 32691859200, 479480601600, 7671689625600, 130418723635200, 2356429211136000, 44772155011584000, 895443100231680000, 18794168013164544000, 413471696289619968000
(列表;图表;参考;听;历史;文本;内部格式)
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