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1, 3, 18, 136, 1152, 10458, 99472, 978453, 9871686, 101590654, 1062271704, 11253818628, 120535386692, 1303045817184, 14199323523912, 155805565801803, 1720024043803542, 19090440094335912, 212897898182054224, 2384431948345110510, 26808516659219953680
(列表;图表;参考;听;历史;文本;内部格式)
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