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1, 2, 4, 7, 17, 31, 76, 144, 344, 670, 1560, 3103, 7079, 14315, 32152, 65861, 146183, 302456, 665300, 1387172, 3030464, 6356068, 13813464, 29103412, 62999146, 133190358, 287443371, 609299853, 1311936956, 2786508393, 5989399832
(列表;图表;参考;听;历史;文本;内部格式)
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