| 数据
|
1, 1, 1, 4, 20, 60, 420, 3360, 30240, 151200, 1663200,9979200,129729600,1816214400,27243216000,217945728000,3705077376000,66691392768000,633568231296000,12671364625920000,266098657144320000,5854170457175040000,134645920515025920000,1615751046180311040000
|