[1,6,36,240,1800,15120,141120,1451520,16329600, 199584000,2634508800,37362124800,566658892800, 9153720576000,156920924160000,2845499424768000, 54420176498688000,1094805903679488000, 23112569077678080000,510909421717094400000]