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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | -3 |
| 3 | 1 |
| 4 | 11 |
| 5 | -16 |
| 6 | -35 |
| 7 | -129 |
| 8 | 299 |
| 9 | -386 |
| 10 | -3977 |
| 11 | 8063 |
| 12 | 42489 |
| 13 | 269344 |
| 14 | -1000009 |
| 15 | 3727745 |
| 16 | 47166649 |
| 17 | -123526014 |
| 18 | -1764203419 |
| 19 | -18228952703 |
| 20 | 113727892147 |
| 21 | -1065812586544 |
| 22 | -18344075481339 |
| 23 | 52130069331199 |
| 24 | 2470319425874195 |
[1,2,-3,1,11,-16,-35,-129,299,-386,-3977,8063, 42489,269344,-1000009,3727745,47166649,-123526014, -1764203419,-18228952703,113727892147, -1065812586544,-18344075481339,52130069331199, 2470319425874195] |