n | a(n) |
---|---|
2 | 1 |
3 | 4 |
4 | 13 |
5 | 30 |
6 | -14 |
7 | -504 |
8 | 736 |
9 | 44640 |
10 | -104544 |
11 | -10644480 |
12 | 33246720 |
13 | 5425056000 |
14 | -20843695872 |
15 | -5185511654400 |
16 | 23457840537600 |
17 | 8506857655296000 |
18 | -44092609863966720 |
19 | -22430879475779174400 |
20 | 130748316971139072000 |
[1,4,13,30,-14,-504,736,44640,-104544,-10644480, 33246720,5425056000,-20843695872,-5185511654400, 23457840537600,8506857655296000, -44092609863966720,-22430879475779174400, 130748316971139072000] |