n | a(n) |
---|---|
0 | 3 |
1 | 0 |
2 | 3 |
3 | 1 |
4 | 9 |
5 | 6 |
6 | 45 |
7 | 42 |
8 | 279 |
9 | 320 |
10 | 1977 |
11 | 2610 |
12 | 15306 |
13 | 22404 |
14 | 126300 |
15 | 200158 |
16 | 1093515 |
17 | 1846314 |
18 | 9830547 |
19 | 17481864 |
[3,0,3,1,9,6,45,42,279,320,1977,2610,15306,22404, 126300,200158,1093515,1846314,9830547,17481864] |