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1, 5, 19, 150, 561, 4797, 18089, 156900, 596674, 5205950, 19932353, 174609162, 672106267, 5906040623, 22829936683, 201114700568, 780077588440, 6885880226784, 26784015828458, 236826459554380, 923352937530146, 8175978023317170, 31940549289135429, 283166067626865540
(列表;图表;参考;听;历史;文本;内部格式)
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