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1, 2, 6, 30, 210, 2730, 30030, 510510, 9699690, 223092870, 8254436190, 602573841870, 17474641414230, 541713883841130, 23293697005168590, 1840202063408318610, 97530709360640886330, 8095048876933193565390, 542368274754523968881130, 22237099264935482724126330
(列表;图表;参考;听;历史;文本;内部格式)
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