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1, 3, 14, 84, 360, 2160, 10080, 60480, 249984, 1499904, 6999552, 41997312, 179988480, 1079930880, 5039677440, 30238064640, 122903101440, 737418608640, 3441286840320, 20647721041920, 88490233036800, 530941398220800, 2477726525030400, 14866359150182400
(列表;图表;参考;听;历史;文本;内部格式)
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