n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | -2 |
4 | 0 |
5 | 16 |
6 | 50 |
7 | -132 |
8 | -2184 |
9 | -9984 |
10 | 6912 |
11 | 341760 |
12 | 38544 |
13 | -47086272 |
14 | -702019344 |
15 | -6076389984 |
16 | -43980940800 |
17 | -656377887744 |
18 | -16782743357568 |
19 | -368775477229824 |
20 | -6770025717901056 |
21 | -118247220867640320 |
22 | -2271088046291742720 |
23 | -50203882870716579840 |
[1,0,-1,-2,0,16,50,-132,-2184,-9984,6912,341760, 38544,-47086272,-702019344,-6076389984, -43980940800,-656377887744,-16782743357568, -368775477229824,-6770025717901056, -118247220867640320,-2271088046291742720, -50203882870716579840] |