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1, 2, 2, 6, 13, 25, 51, 102, 208, 411, 823, 1646, 3296, 6599, 13210, 26446, 52943, 105785, 211571, 423142, 846288, 1692583, 3385178, 6770382, 13540815, 27081736, 54163675, 108327762, 216656347, 433314344, 866631991, 1733270593
(列表;图表;参考;听;历史;文本;内部格式)
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