n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 55 |
6 | 322 |
7 | 2114 |
8 | 15556 |
9 | 127005 |
10 | 1135374 |
11 | 11011220 |
12 | 115080825 |
13 | 1288589757 |
14 | 15379512670 |
15 | 194796087841 |
16 | 2608470709562 |
17 | 36805935282625 |
18 | 545626818921885 |
19 | 8475730766054047 |
20 | 137637670315066835 |
21 | 2331584745107027528 |
22 | 41122505417366272200 |
[1,0,1,3,11,55,322,2114,15556,127005,1135374, 11011220,115080825,1288589757,15379512670, 194796087841,2608470709562,36805935282625, 545626818921885,8475730766054047, 137637670315066835,2331584745107027528, 41122505417366272200] |