n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | -1 |
3 | 8 |
4 | 19 |
5 | -276 |
6 | -1002 |
7 | 21216 |
8 | 103395 |
9 | -2881180 |
10 | -17620142 |
11 | 609297072 |
12 | 4483215086 |
13 | -185182296040 |
14 | -1592692090420 |
15 | 76512069014400 |
16 | 753146574607395 |
17 | -41256108712556460 |
18 | -457383584443526790 |
19 | 28138583115102810000 |
20 | 346933879489006727610 |
21 | -23683708768534714984920 |
[1,-1,-1,8,19,-276,-1002,21216,103395,-2881180, -17620142,609297072,4483215086,-185182296040, -1592692090420,76512069014400,753146574607395, -41256108712556460,-457383584443526790, 28138583115102810000,346933879489006727610, -23683708768534714984920] |