n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | 3 |
4 | -15 |
5 | 85 |
6 | -570 |
7 | 4509 |
8 | -40804 |
9 | 414864 |
10 | -4686570 |
11 | 58245650 |
12 | -789691134 |
13 | 11598605460 |
14 | -183459343613 |
15 | 3109122970590 |
16 | -56203651969935 |
17 | 1079493501290439 |
18 | -21953265755518782 |
19 | 471258656426134701 |
20 | -10648683969964745520 |
21 | 252651472831081785300 |
[0,1,-1,3,-15,85,-570,4509,-40804,414864,-4686570, 58245650,-789691134,11598605460,-183459343613, 3109122970590,-56203651969935,1079493501290439, -21953265755518782,471258656426134701, -10648683969964745520,252651472831081785300] |