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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -3 |
| 3 | 1 |
| 4 | 17 |
| 5 | -49 |
| 6 | -71 |
| 7 | 1079 |
| 8 | -3263 |
| 9 | -10529 |
| 10 | 156401 |
| 11 | -624601 |
| 12 | -1858319 |
| 13 | 42109055 |
| 14 | -249633047 |
| 15 | -187690049 |
| 16 | 17346988289 |
| 17 | -159631097281 |
| 18 | 375894263521 |
| 19 | 8905140874583 |
| 20 | -137481700309199 |
| 21 | 830604602372959 |
| 22 | 3549053339380121 |
| 23 | -139582700722475473 |
| 24 | 1526848956867592513 |
[1,0,-3,1,17,-49,-71,1079,-3263,-10529,156401, -624601,-1858319,42109055,-249633047,-187690049, 17346988289,-159631097281,375894263521, 8905140874583,-137481700309199,830604602372959, 3549053339380121,-139582700722475473, 1526848956867592513] |