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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | -1 |
| 5 | -11 |
| 6 | -34 |
| 7 | -87 |
| 8 | -199 |
| 9 | -803 |
| 10 | 30260 |
| 11 | -6666549 |
| 12 | 4437571247 |
| 13 | 89838030364819 |
| 14 | -618601670062754874640 |
| 15 | -2753159856116491857977786378841 |
| 16 | -247721126779198534020836382643398254287524379 |
[1,2,3,-1,-11,-34,-87,-199,-803,30260,-6666549, 4437571247,89838030364819,-618601670062754874640, -2753159856116491857977786378841, -247721126779198534020836382643398254287524379] |