n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 12 |
4 | 80 |
5 | 720 |
6 | 9152 |
7 | 165312 |
8 | 4244480 |
9 | 154732800 |
10 | 8005686272 |
11 | 587435092992 |
12 | 61116916981760 |
13 | 9011561121239040 |
14 | 1882834327457349632 |
15 | 557257804202631217152 |
16 | 233610656002563147038720 |
17 | 138681207656726645785559040 |
18 | 116575238610106596799428165632 |
[0,2,12,80,720,9152,165312,4244480,154732800, 8005686272,587435092992,61116916981760, 9011561121239040,1882834327457349632, 557257804202631217152,233610656002563147038720, 138681207656726645785559040, 116575238610106596799428165632] |