n | a(n) |
---|---|
2 | 1 |
3 | 0 |
4 | 4 |
5 | 0 |
6 | 15 |
7 | 1 |
8 | 56 |
9 | 9 |
10 | 210 |
11 | 56 |
12 | 792 |
13 | 299 |
14 | 3003 |
15 | 1470 |
16 | 11441 |
17 | 6868 |
18 | 43776 |
19 | 31008 |
20 | 168151 |
21 | 136629 |
22 | 648208 |
23 | 591261 |
24 | 2507046 |
25 | 2523676 |
26 | 9726080 |
27 | 10656387 |
28 | 37839375 |
29 | 44612702 |
30 | 147600981 |
31 | 185477216 |
32 | 577147212 |
33 | 766744608 |
34 | 2261792303 |
[1,0,4,0,15,1,56,9,210,56,792,299,3003,1470,11441, 6868,43776,31008,168151,136629,648208,591261, 2507046,2523676,9726080,10656387,37839375, 44612702,147600981,185477216,577147212,766744608, 2261792303] |