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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -2 |
| 3 | -9 |
| 4 | -12 |
| 5 | 175 |
| 6 | 1938 |
| 7 | 9506 |
| 8 | -24248 |
| 9 | -1065663 |
| 10 | -12021610 |
| 11 | -56195425 |
| 12 | 677072220 |
| 13 | 19979234080 |
| 14 | 251733387514 |
| 15 | 1135594212255 |
| 16 | -29317384858352 |
| 17 | -901607623649489 |
| 18 | -13233854770928514 |
| 19 | -68574233644270566 |
| 20 | 2258648937829442660 |
| 21 | 81748108921355457777 |
[1,0,-2,-9,-12,175,1938,9506,-24248,-1065663, -12021610,-56195425,677072220,19979234080, 251733387514,1135594212255,-29317384858352, -901607623649489,-13233854770928514, -68574233644270566,2258648937829442660, 81748108921355457777] |