| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -1 |
| 3 | 4 |
| 4 | -7 |
| 5 | 10 |
| 6 | 68 |
| 7 | -578 |
| 8 | 3825 |
| 9 | -14508 |
| 10 | 38367 |
| 11 | -46170 |
| 12 | 37125 |
| 13 | 740520 |
| 14 | 7341147 |
| 15 | -211529660 |
| 16 | 2662060613 |
| 17 | -31141230062 |
| 18 | 234276517760 |
| 19 | -1130151516242 |
| 20 | 4893200552669 |
| 21 | -6576135166508 |
| 22 | 7495109866067 |
| 23 | 233921918627644 |
| 24 | 6741771472435181 |
| 25 | -80428962094730600 |
[0,-1,4,-7,10,68,-578,3825,-14508,38367,-46170, 37125,740520,7341147,-211529660,2662060613, -31141230062,234276517760,-1130151516242, 4893200552669,-6576135166508,7495109866067, 233921918627644,6741771472435181, -80428962094730600] |