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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | -23 |
| 5 | -119 |
| 6 | -359 |
| 7 | 1681 |
| 8 | 38641 |
| 9 | 269137 |
| 10 | 599761 |
| 11 | -22461119 |
| 12 | -347288039 |
| 13 | -8704873319 |
| 14 | -73184815703 |
| 15 | 16491842641 |
| 16 | 26323288948321 |
| 17 | 725566429691041 |
| 18 | 7867441656997921 |
| 19 | -20568394299884543 |
| 20 | -4768992217846599479 |
| 21 | -108339469662214468439 |
[1,1,1,1,-23,-119,-359,1681,38641,269137,599761, -22461119,-347288039,-8704873319,-73184815703, 16491842641,26323288948321,725566429691041, 7867441656997921,-20568394299884543, -4768992217846599479,-108339469662214468439] |