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0, 5, 35, 189, 924, 4290, 19305, 85085, 369512, 1587222, 6760390, 28601650, 120349800, 504131940, 2103781365, 8751023325, 36300541200, 150217371150, 620309379690, 2556724903590, 10520494818600, 43225511319900, 177361820257050, 726860987017074, 2975511197688624, 12168371410300700
(列表;图表;参考;听;历史;文本;内部格式)
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