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0, 3, 15, 61, 219, 743, 2421, 7677, 23848, 72928, 220265, 658616, 1953058, 5751375, 16836460, 49035261, 142177769, 410634197, 1181879445, 3391163719, 9703303909, 27695130425, 78868082615, 224130479264, 635738931117, 1800122483435
(列表;图表;参考;听;历史;文本;内部格式)
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