n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 5 |
7 | 22 |
8 | 90 |
9 | 342 |
10 | 1247 |
11 | 4491 |
12 | 16095 |
13 | 57906 |
14 | 209170 |
15 | 760830 |
16 | 2784913 |
17 | 10262649 |
18 | 38051063 |
19 | 141914613 |
20 | 532131882 |
21 | 2005320952 |
22 | 7591794561 |
23 | 28863820538 |
24 | 110172051829 |
25 | 422060152511 |
26 | 1622369728951 |
[1,0,0,0,0,5,22,90,342,1247,4491,16095,57906, 209170,760830,2784913,10262649,38051063,141914613, 532131882,2005320952,7591794561,28863820538, 110172051829,422060152511,1622369728951] |