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2, 3, 6, 12, 24, 47, 94, 187, 373, 745, 1490, 2979, 5958, 11916, 23832, 47663, 95326, 190651, 381301, 762601, 1525202, 3050403, 6100806, 12201612, 24403224, 48806447, 97612894, 195225787, 390451573, 780903145, 1561806290, 3123612579, 6247225158
(列表;图表;参考;听;历史;文本;内部格式)
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