n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 2 |
5 | 10 |
6 | 0 |
7 | 0 |
8 | 4 |
9 | 8 |
10 | 28 |
11 | 100 |
12 | 186 |
13 | 624 |
14 | 1720 |
15 | 7288 |
16 | 30666 |
17 | 100220 |
18 | 360208 |
19 | 1517804 |
20 | 7302336 |
21 | 29429672 |
22 | 139854636 |
23 | 753288744 |
[1,0,0,2,10,0,0,4,8,28,100,186,624,1720,7288, 30666,100220,360208,1517804,7302336,29429672, 139854636,753288744] |