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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | -810 |
| 3 | -14848 |
| 4 | -123111 |
| 5 | -544644 |
| 6 | -1362010 |
| 7 | -2330370 |
| 8 | -3239838 |
| 9 | 2585060 |
| 10 | 15441024 |
| 11 | 4575528 |
| 12 | 56803975 |
| 13 | 51302133 |
| 14 | -76460274 |
| 15 | -7843816 |
| 16 | 58087692 |
| 17 | -680814720 |
| 18 | 178532126 |
| 19 | -82694130 |
| 20 | -573777270 |
| 21 | 317066108 |
| 22 | 1870315110 |
| 23 | -1107862272 |
| 24 | 2815890921 |
| 25 | 240200154 |
| 26 | 1340122806 |
[1,-3,-810,-14848,-123111,-544644,-1362010, -2330370,-3239838,2585060,15441024,4575528, 56803975,51302133,-76460274,-7843816,58087692, -680814720,178532126,-82694130,-573777270, 317066108,1870315110,-1107862272,2815890921, 240200154,1340122806] |