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4, 12, 42, 152, 562, 2108, 7986, 30476, 116950, 450756, 1743470, 6763152, 26299104, 102478208, 400032822, 1563985172, 6122945694, 23999991452, 94173327894, 369881810616, 1454036828992, 5720448937528, 22521468585822, 88725551176384
(列表;图表;参考;听;历史;文本;内部格式)
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