n | a(n) |
---|---|
0 | 1 |
1 | -12 |
2 | 84 |
3 | -448 |
4 | 2004 |
5 | -7896 |
6 | 28224 |
7 | -93312 |
8 | 289236 |
9 | -848972 |
10 | 2377704 |
11 | -6391872 |
12 | 16571968 |
13 | -41599320 |
14 | 101430144 |
15 | -240877440 |
16 | 558440916 |
17 | -1266406680 |
18 | 2814053908 |
19 | -6136337088 |
20 | 13148606184 |
21 | -27717527552 |
[1,-12,84,-448,2004,-7896,28224,-93312,289236, -848972,2377704,-6391872,16571968,-41599320, 101430144,-240877440,558440916,-1266406680, 2814053908,-6136337088,13148606184,-27717527552] |