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1, 1, 4, 11, 41, 148, 581, 2298, 9414, 39020, 164742, 702845, 3031984, 13191615, 57837324, 255216761, 1132838932, 5053711738, 22647339728, 101905858689, 460213087530, 2085199217472, 9476513961459, 43185037964172, 197289709201004, 903402441704377, 4145508982924713, 19060139964446839
(列表;图表;参考;听;历史;文本;内部格式)
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