n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | -12 |
4 | -96 |
5 | -480 |
6 | 0 |
7 | 40320 |
8 | 645120 |
9 | 5806080 |
10 | 0 |
11 | -1277337600 |
12 | -30656102400 |
13 | -398529331200 |
14 | 0 |
15 | 167382319104000 |
16 | 5356234211328000 |
17 | 91055981592576000 |
18 | 0 |
19 | -62282291409321984000 |
20 | -2491291656372879360000 |
21 | -52317124783830466560000 |
22 | 0 |
[1,0,-12,-96,-480,0,40320,645120,5806080,0, -1277337600,-30656102400,-398529331200,0, 167382319104000,5356234211328000, 91055981592576000,0,-62282291409321984000, -2491291656372879360000,-52317124783830466560000, 0] |