n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | -3 |
4 | 9 |
5 | -30 |
6 | 107 |
7 | -357 |
8 | 492 |
9 | 11520 |
10 | -234440 |
11 | 3556520 |
12 | -51373780 |
13 | 750804600 |
14 | -11349186700 |
15 | 179062886100 |
16 | -2959725476000 |
17 | 51309772966400 |
18 | -932811192037200 |
19 | 17769951660870000 |
20 | -354309379544446000 |
21 | 7384407204701604000 |
22 | -160652936843547018000 |
[0,0,1,-3,9,-30,107,-357,492,11520,-234440, 3556520,-51373780,750804600,-11349186700, 179062886100,-2959725476000,51309772966400, -932811192037200,17769951660870000, -354309379544446000,7384407204701604000, -160652936843547018000] |