|
1, 1, 4, 15, 120, 780, 9744, 92085, 1589760, 19983915, 445344000, 7053735150, 194162549760, 3735730993995, 123152970608640, 2803291544678625, 108175188829962240, 2855475766145702700, 126726160086516695040, 3818865908630429932275, 192201344414226343526400
(列表;图表;参考;听;历史;文本;内部格式)
|
|