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| n | a(n) |
|---|---|
| 1 | 18 |
| 2 | -5 |
| 3 | 107 |
| 4 | -125 |
| 5 | 712 |
| 6 | -1152 |
| 7 | -1719 |
| 8 | -865 |
| 9 | -5370 |
| 10 | -7870 |
| 11 | 2518 |
| 12 | -963 |
| 13 | -29949 |
| 14 | -20030 |
| 15 | 111491 |
| 16 | 87797 |
| 17 | 261536 |
| 18 | 2274319 |
| 19 | -140357 |
| 20 | -3938794 |
| 21 | -139674130 |
| 22 | -792131385 |
[18,-5,107,-125,712,-1152,-1719,-865,-5370,-7870, 2518,-963,-29949,-20030,111491,87797,261536, 2274319,-140357,-3938794,-139674130,-792131385] |