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1, 1, 4, 26, 243, 2992, 45906, 845287, 17637091, 412976516, 10702355041, 304058582059, 9396887340381, 313853270626962, 11265355519125229, 432420217726582213, 17674492093095982705, 766343475354260380416, 35129831766609666284023, 1697466558811335003294745
(列表;图表;参考;听;历史;文本;内部格式)
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