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1, 3, 10, 39, 156, 651, 2803, 12218, 54331, 244094, 1106978, 5068058, 23334902, 108150502, 503753548, 2356387859, 11069504275, 52169455719, 246667514552, 1169587215167, 5559341257547, 26488381338623, 126466805257309, 604986670813445, 2899284252998229, 13916709926795557, 66904010992079948
(列表;图表;参考;听;历史;文本;内部格式)
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