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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -1 |
| 2 | 8 |
| 3 | -28 |
| 4 | 71 |
| 5 | -150 |
| 6 | 281 |
| 7 | -483 |
| 8 | 778 |
| 9 | -1191 |
| 10 | 1750 |
| 11 | -2486 |
| 12 | 3433 |
| 13 | -4628 |
| 14 | 6111 |
| 15 | -7925 |
| 16 | 10116 |
| 17 | -12733 |
| 18 | 15828 |
| 19 | -19456 |
| 20 | 23675 |
| 21 | -28546 |
| 22 | 34133 |
| 23 | -40503 |
| 24 | 47726 |
| 25 | -55875 |
| 26 | 65026 |
| 27 | -75258 |
| 28 | 86653 |
| 29 | -99296 |
[0,-1,8,-28,71,-150,281,-483,778,-1191,1750,-2486, 3433,-4628,6111,-7925,10116,-12733,15828,-19456, 23675,-28546,34133,-40503,47726,-55875,65026, -75258,86653,-99296] |