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1, 1, 1, 2, 6, 12, 20, 10, 84, 840, 72, 630, 1320, 2772, 1560, 90090, 42, 240240, 1904, 46410, 95760, 639540, 5040, 9699690, 637560, 14316120, 92400, 176125950, 308880, 20078358300, 475020, 67690350, 7447440, 116925953760, 110880, 1002802450650, 318240, 122453100, 906665760, 165723680430
(列表;图表;参考;听;历史;文本;内部格式)
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