n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 156 |
5 | 4680 |
6 | 42120 |
7 | 43931160 |
8 | 1489793497920 |
9 | 89075729055377937600 |
10 | 51745303414377493336016875691726400 |
11 | 11120662689162548692119420650118842670724939176955384978536000 |
[1,2,12,156,4680,42120,43931160,1489793497920, 89075729055377937600, 51745303414377493336016875691726400, 11120662689162548692119420650118842670724939176955\ 384978536000] |