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1, 1, 4, 10, 33, 115, 391, 1439, 5405, 20303, 79050, 311520, 1230961, 4964657, 20189652, 82314358, 340130593, 1413947795, 5890309480, 24773921096, 104674234969, 443030309859, 1888676636461, 8080601115239, 34621402879031, 149177215251621, 644645021479230, 2789004825787100, 12121746816861675
(列表;图表;参考文献;听;历史;文本;内部格式)
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