n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | 3 |
4 | -9 |
5 | 30 |
6 | -109 |
7 | 420 |
8 | -1685 |
9 | 6960 |
10 | -29391 |
11 | 126291 |
12 | -550359 |
13 | 2426502 |
14 | -10803801 |
15 | 48507843 |
16 | -219377949 |
17 | 998436792 |
18 | -4569488371 |
19 | 21016589073 |
20 | -97090411019 |
21 | 450314942682 |
22 | -2096122733211 |
23 | 9788916220518 |
[1,0,-1,3,-9,30,-109,420,-1685,6960,-29391,126291, -550359,2426502,-10803801,48507843,-219377949, 998436792,-4569488371,21016589073,-97090411019, 450314942682,-2096122733211,9788916220518] |