n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 108 |
6 | 2712 |
7 | 327240 |
8 | 235617840 |
9 | 1187514095040 |
10 | 47880568312738560 |
11 | 17374900629326652478080 |
12 | 63050039403700556512496620800 |
[1,1,3,12,108,2712,327240,235617840,1187514095040, 47880568312738560,17374900629326652478080, 63050039403700556512496620800] |