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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -29 |
| 2 | 377 |
| 3 | -2900 |
| 4 | 14877 |
| 5 | -56666 |
| 6 | 189109 |
| 7 | -649339 |
| 8 | 2219834 |
| 9 | -6777677 |
| 10 | 19041980 |
| 11 | -54885893 |
| 12 | 159810358 |
| 13 | -432662339 |
| 14 | 1117635553 |
| 15 | -2957018205 |
| 16 | 7799355410 |
| 17 | -19555103564 |
| 18 | 48073453671 |
| 19 | -119774561120 |
| 20 | 294567447945 |
[1,-29,377,-2900,14877,-56666,189109,-649339, 2219834,-6777677,19041980,-54885893,159810358, -432662339,1117635553,-2957018205,7799355410, -19555103564,48073453671,-119774561120, 294567447945] |