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1, 0, 0, 6240, 64910, 624128, 3928640, 21820160, 102066525, 435107840, 1681228928, 6065581440, 20483625750, 65651665920, 200400925120, 587021103104, 1655255008870, 4513857474560, 11934605001600, 30689664533440, 76909902651384, 188251191994880, 450777531819200
(列表;图表;参考;听;历史;文本;内部格式)
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