n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 0 |
3 | 6 |
4 | -12 |
5 | -144 |
6 | 1080 |
7 | 5184 |
8 | -127008 |
9 | 95904 |
10 | 19077120 |
11 | -154929024 |
12 | -3210337152 |
13 | 70284900096 |
14 | 391453171200 |
15 | -30354545511936 |
16 | 153830450875392 |
17 | 13189520200402944 |
18 | -244127117929789440 |
19 | -5109022268709986304 |
20 | 237988748560571301888 |
21 | 571783124036801765376 |
[1,-1,0,6,-12,-144,1080,5184,-127008,95904, 19077120,-154929024,-3210337152,70284900096, 391453171200,-30354545511936,153830450875392, 13189520200402944,-244127117929789440, -5109022268709986304,237988748560571301888, 571783124036801765376] |