n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 5 |
6 | 21 |
7 | 103 |
8 | 752 |
9 | 7385 |
10 | 91939 |
11 | 1345933 |
12 | 22170664 |
13 | 401399440 |
14 | 7887389438 |
15 | 166897766824 |
16 | 3781593764772 |
[0,0,0,1,2,5,21,103,752,7385,91939,1345933, 22170664,401399440,7887389438,166897766824, 3781593764772] |