n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | 0 |
4 | -3 |
5 | 20 |
6 | 3 |
7 | 420 |
8 | -343 |
9 | 8424 |
10 | -22249 |
11 | 260040 |
12 | -239547 |
13 | 10498748 |
14 | 94138107 |
15 | -147119700 |
16 | 19810696721 |
17 | -201766341168 |
18 | 3757708820591 |
19 | -61124264974704 |
20 | 781479753273933 |
21 | -16996638107062684 |
[1,0,-1,0,-3,20,3,420,-343,8424,-22249,260040, -239547,10498748,94138107,-147119700,19810696721, -201766341168,3757708820591,-61124264974704, 781479753273933,-16996638107062684] |