n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 3 |
4 | 20 |
5 | 30 |
6 | 15 |
7 | 161 |
8 | 525 |
9 | 525 |
10 | 105 |
11 | 1584 |
12 | 8232 |
13 | 17640 |
14 | 13230 |
15 | 945 |
16 | 18579 |
17 | 134970 |
18 | 457380 |
19 | 727650 |
20 | 436590 |
[1,1,3,3,20,30,15,161,525,525,105,1584,8232,17640, 13230,945,18579,134970,457380,727650,436590] |