[0,0,2,12,144,2640,64800,1985760,72817920,
3105527040,150907276800,8226772646400,
497068582348800,32962398345676800,
2379770152465305600,185792734381782528000,
15595576381312671744000,1400555897449216155648000,
133983477830143785811968000,
13602115002476999012990976000]
|