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1, 1, 1, 1, 1, 1, 2, 7, 14, 27, 54, 108, 216, 431, 862, 1724, 3450, 6899, 13798, 27596, 55190, 110378, 220754, 441506, 883010, 1766020, 3532046, 7064092, 14128182, 28256364, 56512728, 113025456, 226050910, 452101820, 904203640, 1808407284
(列表;图表;参考;听;历史;文本;内部格式)
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