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1, 2, 6, 13, 29, 60, 128, 269, 569, 1198, 2526, 5321, 11213, 23624, 49776, 104873, 220961, 465546, 980870, 2066613, 4354189, 9173924, 19328720, 40724053, 85802297, 180778518, 380885758, 802495569, 1690793437, 3562365392, 7505616544, 15813728657, 33318250753
(列表;图表;参考文献;听;历史;文本;内部格式)
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