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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -8 |
| 2 | -20 |
| 3 | -24 |
| 4 | 144 |
| 5 | -384 |
| 6 | -832 |
| 7 | -896 |
| 8 | 4352 |
| 9 | -10240 |
| 10 | -21504 |
| 11 | -22528 |
| 12 | 102400 |
| 13 | -229376 |
| 14 | -475136 |
| 15 | -491520 |
| 16 | 2162688 |
| 17 | -4718592 |
| 18 | -9699328 |
| 19 | -9961472 |
| 20 | 42991616 |
| 21 | -92274688 |
| 22 | -188743680 |
| 23 | -192937984 |
| 24 | 822083584 |
| 25 | -1744830464 |
| 26 | -3556769792 |
[1,-8,-20,-24,144,-384,-832,-896,4352,-10240, -21504,-22528,102400,-229376,-475136,-491520, 2162688,-4718592,-9699328,-9961472,42991616, -92274688,-188743680,-192937984,822083584, -1744830464,-3556769792] |