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0, 1, 9, 61, 385, 2365, 14353, 86605, 521089, 3130909, 18798577, 112830829, 677103073, 4062972733, 24378899281, 146276584333, 877669071937, 5266043129437, 31596344870065, 189578327500717, 1137470739845281, 6824826763594621, 40948967555136529
(列表;图表;参考;听;历史;文本;内部格式)
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