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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | -2 |
| 4 | -7 |
| 5 | -14 |
| 6 | 13 |
| 7 | 113 |
| 8 | 337 |
| 9 | 19 |
| 10 | -2579 |
| 11 | -10867 |
| 12 | -9911 |
| 13 | 71852 |
| 14 | 431229 |
| 15 | 741181 |
| 16 | -2178783 |
| 17 | -20081708 |
| 18 | -51012467 |
| 19 | 58414532 |
| 20 | 1061935641 |
| 21 | 3651310699 |
| 22 | 1841181 |
| 23 | -62090909433 |
| 24 | -279070619279 |
| 25 | -250335322449 |
| 26 | 3913178936941 |
| 27 | 22877592319648 |
| 28 | 38634162528361 |
[1,1,1,-2,-7,-14,13,113,337,19,-2579,-10867,-9911, 71852,431229,741181,-2178783,-20081708,-51012467, 58414532,1061935641,3651310699,1841181, -62090909433,-279070619279,-250335322449, 3913178936941,22877592319648,38634162528361] |