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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -21 |
| 2 | 168 |
| 3 | -511 |
| 4 | -756 |
| 5 | 8946 |
| 6 | -13265 |
| 7 | -41604 |
| 8 | 100023 |
| 9 | 168819 |
| 10 | -192675 |
| 11 | -1687035 |
| 12 | 551446 |
| 13 | 9388890 |
| 14 | 39015 |
| 15 | -23757153 |
| 16 | -51335655 |
| 17 | 33287667 |
| 18 | 289673223 |
| 19 | 168014469 |
| 20 | -413315910 |
| 21 | -2158209675 |
| 22 | -1508351355 |
| 23 | 6477445065 |
[1,-21,168,-511,-756,8946,-13265,-41604,100023, 168819,-192675,-1687035,551446,9388890,39015, -23757153,-51335655,33287667,289673223,168014469, -413315910,-2158209675,-1508351355,6477445065] |