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2, 5, 13, 47, 173, 709, 3109, 14929, 80429, 447829, 2724079, 17442769, 114379879, 784149077, 5708691479, 43849291271, 342473913367, 2803269796331, 23620771158583, 201815957246317, 1793779464521953, 16342108667160251, 154171144824008969, 1518409682511777919, 15259828451149028543
(列表;图表;参考;听;历史;文本;内部格式)
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