n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 30 |
5 | 180 |
6 | 1260 |
7 | 12600 |
8 | 138600 |
9 | 1801800 |
10 | 25225200 |
11 | 378378000 |
12 | 6432426000 |
13 | 122216094000 |
14 | 2566537974000 |
15 | 56463835428000 |
16 | 1298668214844000 |
17 | 33765373585944000 |
18 | 979195833992376000 |
19 | 29375875019771280000 |
[1,2,6,30,180,1260,12600,138600,1801800,25225200, 378378000,6432426000,122216094000,2566537974000, 56463835428000,1298668214844000,33765373585944000, 979195833992376000,29375875019771280000] |