n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 144 |
5 | 2400 |
6 | 50760 |
7 | 1310400 |
8 | 39984000 |
9 | 1407490560 |
10 | 56143130400 |
11 | 2502730137600 |
12 | 123302540148480 |
13 | 6653043673436160 |
14 | 390182090889951360 |
15 | 24713127865269043200 |
16 | 1681180295452142284800 |
17 | 122252619549518954496000 |
18 | 9463442426016057083404800 |
19 | 776944497581062575154790400 |
[1,2,12,144,2400,50760,1310400,39984000, 1407490560,56143130400,2502730137600, 123302540148480,6653043673436160, 390182090889951360,24713127865269043200, 1681180295452142284800,122252619549518954496000, 9463442426016057083404800, 776944497581062575154790400] |