n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 14 |
3 | 108 |
4 | 1180 |
5 | 15400 |
6 | 255400 |
7 | 4888960 |
8 | 109951360 |
9 | 2793984000 |
10 | 79855107200 |
11 | 2522981120000 |
12 | 87503244928000 |
13 | 3299660415744000 |
14 | 134477619593856000 |
15 | 5887149103503360000 |
16 | 275541626811601920000 |
17 | 13727736328568199168000 |
18 | 725335510624740370432000 |
[1,2,14,108,1180,15400,255400,4888960,109951360, 2793984000,79855107200,2522981120000, 87503244928000,3299660415744000, 134477619593856000,5887149103503360000, 275541626811601920000,13727736328568199168000, 725335510624740370432000] |