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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 15 |
| 3 | 35 |
| 4 | -650 |
| 5 | -5251 |
| 6 | 83376 |
| 7 | 1623439 |
| 8 | -19261584 |
| 9 | -836109351 |
| 10 | 5365104400 |
| 11 | 636771444011 |
| 12 | 561938325312 |
| 13 | -661384866976523 |
| 14 | -7128491581221360 |
| 15 | 879709224738485415 |
| 16 | 21742632225425026816 |
| 17 | -1413667730904479933647 |
| 18 | -64871991410092201623024 |
| 19 | 2556051301724027073500035 |
| 20 | 212244727356899863738042560 |
[0,1,15,35,-650,-5251,83376,1623439,-19261584, -836109351,5365104400,636771444011,561938325312, -661384866976523,-7128491581221360, 879709224738485415,21742632225425026816, -1413667730904479933647,-64871991410092201623024, 2556051301724027073500035, 212244727356899863738042560] |