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1, 1, 5, 6, 35, 321, 677, 4383, 22592, 72159, 383387, 3139255, 28636682, 203596029, 1861000943, 5786598858, 13434198659, 46089194835, 382147757339, 1574680224191, 9830229102485, 21235138429161, 137241059677451, 570199377138965, 1847839191094346
(列表;图表;参考;听;历史;文本;内部格式)
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