n | a(n) |
---|---|
1 | 0 |
2 | 8 |
3 | 120 |
4 | 1680 |
5 | 23408 |
6 | 326040 |
7 | 4541160 |
8 | 63250208 |
9 | 880961760 |
10 | 12270214440 |
11 | 170902040408 |
12 | 2380358351280 |
13 | 33154114877520 |
14 | 461777249934008 |
15 | 6431727384198600 |
16 | 89582406128846400 |
17 | 1247721958419651008 |
18 | 17378525011746267720 |
19 | 242051628206028097080 |
[0,8,120,1680,23408,326040,4541160,63250208, 880961760,12270214440,170902040408,2380358351280, 33154114877520,461777249934008,6431727384198600, 89582406128846400,1247721958419651008, 17378525011746267720,242051628206028097080] |