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1, 2, 4, 6, 9, 21, 39, 73, 116, 270, 537, 1069, 2108, 4139, 7857, 14143, 22537, 52930, 105857, 211709, 423388, 846699, 1692977, 3384383, 6763017, 13511354, 26939388, 53561245, 105852901, 206635762, 393095153, 707276793, 1127311334
(列表;图表;参考;听;历史;文本;内部格式)
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