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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -11 |
| 3 | -23 |
| 4 | 109 |
| 5 | 385 |
| 6 | -923 |
| 7 | -5543 |
| 8 | 5533 |
| 9 | 72049 |
| 10 | 5653 |
| 11 | -858935 |
| 12 | -926771 |
| 13 | 9380449 |
| 14 | 20501701 |
| 15 | -92063687 |
| 16 | -338084099 |
| 17 | 766680145 |
| 18 | 4823689333 |
| 19 | -4376472407 |
| 20 | -62260744403 |
| 21 | -9743075519 |
| 22 | 737385857317 |
| 23 | 854302763545 |
| 24 | -7994327524259 |
[1,1,-11,-23,109,385,-923,-5543,5533,72049,5653, -858935,-926771,9380449,20501701,-92063687, -338084099,766680145,4823689333,-4376472407, -62260744403,-9743075519,737385857317, 854302763545,-7994327524259] |