n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 7 |
5 | 16 |
6 | 43 |
7 | 105 |
8 | 255 |
9 | 646 |
10 | 1547 |
11 | 3605 |
12 | 8241 |
13 | 19279 |
14 | 44706 |
15 | 105212 |
16 | 246683 |
17 | 585355 |
18 | 1401644 |
19 | 3381806 |
20 | 8220777 |
21 | 20138200 |
22 | 49679870 |
[0,0,1,7,16,43,105,255,646,1547,3605,8241,19279, 44706,105212,246683,585355,1401644,3381806, 8220777,20138200,49679870] |