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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | -1 |
| 5 | 0 |
| 6 | -1 |
| 7 | -1 |
| 8 | -344 |
| 9 | -2 |
| 10 | -7733 |
| 11 | -4873 |
| 12 | -10514857 |
| 13 | -3449 |
| 14 | -738707 |
| 15 | -71666467 |
| 16 | -129310473049 |
| 17 | -35839 |
| 18 | -19576627 |
| 19 | -45715711199 |
| 20 | -866367643482931 |
| 21 | -572765895007711 |
| 22 | -274989109970083277 |
| 23 | -266112669025361017 |
[1,0,0,-1,0,-1,-1,-344,-2,-7733,-4873,-10514857, -3449,-738707,-71666467,-129310473049,-35839, -19576627,-45715711199,-866367643482931, -572765895007711,-274989109970083277, -266112669025361017] |