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0, 1, 1, 4, 6, 14, 26, 54, 105, 213, 423, 849, 1697, 3399, 6799, 13608, 27220, 54451, 108901, 217789, 435517, 870892, 1741467, 3482322, 6963512, 13925078, 27846979, 55689150, 111371677, 222735709, 445466058, 890938357, 1781916885, 3563957177, 7128223846
(列表;图表;参考;听;历史;文本;内部格式)
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