n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 6 |
9 | 13 |
10 | 57 |
11 | 141 |
12 | 465 |
13 | 1224 |
14 | 3956 |
15 | 11599 |
16 | 36538 |
17 | 107415 |
18 | 327250 |
19 | 972040 |
20 | 2957488 |
21 | 8879327 |
22 | 26943317 |
[0,0,0,0,0,0,0,6,13,57,141,465,1224,3956,11599, 36538,107415,327250,972040,2957488,8879327, 26943317] |