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1, 2, 27, 252, 508, 1037, 2126, 4335, 8691, 17527, 35216, 70560, 141316, 282692, 565716, 1132725, 2266950, 4534986, 9071886, 18144030, 36291630, 72592255, 145199696, 290402196, 580831960, 1161690161, 2323409217, 4646842021, 9293718245, 18587449461, 37174954357, 74350264838
(列表;图表;参考;听;历史;文本;内部格式)
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