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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | -54 |
| 4 | 302 |
| 5 | -1483 |
| 6 | 7009 |
| 7 | -32030 |
| 8 | 143210 |
| 9 | -629848 |
| 10 | 2735812 |
| 11 | -11767534 |
| 12 | 50220042 |
| 13 | -212952283 |
| 14 | 898198877 |
| 15 | -3771484798 |
| 16 | 15775723922 |
| 17 | -65770848988 |
| 18 | 273420862112 |
| 19 | -1133802617998 |
| 20 | 4691140763402 |
| 21 | -19371432850768 |
| 22 | 79850555673176 |
| 23 | -328627887379774 |
| 24 | 1350540667070002 |
| 25 | -5543004766417298 |
[1,11,-54,302,-1483,7009,-32030,143210,-629848, 2735812,-11767534,50220042,-212952283,898198877, -3771484798,15775723922,-65770848988,273420862112, -1133802617998,4691140763402,-19371432850768, 79850555673176,-328627887379774,1350540667070002, -5543004766417298] |