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0, 1, 6, 28, 145, 876, 6139, 49120, 442089, 4420900, 48629911, 583558944, 7586266285, 106207728004, 1593115920075, 25489854721216, 433327530260689, 7799895544692420, 148198015349155999, 2963960306983120000, 62243166446645520021, 1369349661826201440484, 31495042222002633131155, 755881013328063195147744
(列表;图表;参考文献;听;历史;文本;内部格式)
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