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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | -3 |
| 5 | 2 |
| 6 | 0 |
| 7 | 1 |
| 8 | -9 |
| 9 | 32 |
| 10 | -56 |
| 11 | 48 |
| 12 | -16 |
| 13 | 0 |
| 14 | 1 |
| 15 | -18 |
| 16 | 144 |
| 17 | -672 |
| 18 | 2016 |
| 19 | -4031 |
| 20 | 5368 |
| 21 | -4584 |
| 22 | 2272 |
| 23 | -496 |
| 24 | 0 |
| 25 | 1 |
| 26 | -30 |
| 27 | 419 |
| 28 | -3612 |
| 29 | 21477 |
| 30 | -93207 |
| 31 | 304555 |
| 32 | -761340 |
| 33 | 1463473 |
| 34 | -2152758 |
| 35 | 2385118 |
| 36 | -1929184 |
| 37 | 1075936 |
| 38 | -369824 |
| 39 | 58976 |
| 40 | 0 |
[1,0,1,-3,2,0,1,-9,32,-56,48,-16,0,1,-18,144,-672, 2016,-4031,5368,-4584,2272,-496,0,1,-30,419,-3612, 21477,-93207,304555,-761340,1463473,-2152758, 2385118,-1929184,1075936,-369824,58976,0] |