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1, 2, 3, 4, 7, 12, 23, 44, 90, 186, 407, 902, 2072, 4844, 11595, 28150, 69491, 173522, 438423, 1117968, 2875960, 7453070, 19447591, 51050224, 134749849, 357446716, 952527403, 2548897192, 6846986075, 18458150242, 49923931099, 135443922536, 368511905808
(列表;图表;参考;听;历史;文本;内部格式)
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