n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | -3 |
4 | 16 |
5 | -50 |
6 | 440 |
7 | -2856 |
8 | 30896 |
9 | -291528 |
10 | 3518848 |
11 | -41141320 |
12 | 556495520 |
13 | -7659162576 |
14 | 116623578864 |
15 | -1844238858840 |
16 | 31500762034176 |
17 | -562615136891072 |
18 | 10696734155925504 |
19 | -212805382639718016 |
20 | 4464074777217786112 |
21 | -97816050420003646080 |
[0,0,2,-3,16,-50,440,-2856,30896,-291528,3518848, -41141320,556495520,-7659162576,116623578864, -1844238858840,31500762034176,-562615136891072, 10696734155925504,-212805382639718016, 4464074777217786112,-97816050420003646080] |