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1, 1, 3, 13, 67, 369, 2117, 12578, 77163, 487370, 3159905, 20970630, 142077861, 980386614, 6875910589, 48927234261, 352688735259, 2572046483778, 18954720562417, 141019525810066, 1058260597946701, 8004479249101435, 60984028315898881, 467725424401822465
(列表;图表;参考文献;听;历史;文本;内部格式)
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