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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 3 |
| 5 | -9 |
| 6 | 5 |
| 7 | -235 |
| 8 | 35 |
| 9 | -5939 |
| 10 | 10773 |
| 11 | -199746 |
| 12 | 961521 |
| 13 | -10506833 |
| 14 | 82135911 |
| 15 | -836458064 |
| 16 | 8282576627 |
| 17 | -90730736923 |
| 18 | 1034615625645 |
| 19 | -12538466040640 |
| 20 | 159529541334325 |
| 21 | -2133316798885373 |
| 22 | 29875632576041747 |
| 23 | -437461119834677379 |
| 24 | 6683837093985315589 |
[1,0,1,0,3,-9,5,-235,35,-5939,10773,-199746, 961521,-10506833,82135911,-836458064,8282576627, -90730736923,1034615625645,-12538466040640, 159529541334325,-2133316798885373, 29875632576041747,-437461119834677379, 6683837093985315589] |