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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 25 |
| 3 | -761 |
| 4 | 42065 |
| 5 | -3898321 |
| 6 | 521329705 |
| 7 | -96017526281 |
| 8 | 23356125062945 |
| 9 | -7240133620964641 |
| 10 | 2786977252450841785 |
| 11 | -1304375789021987253401 |
| 12 | 729394652578427432666225 |
| 13 | -480281453260247282387992561 |
[1,-1,25,-761,42065,-3898321,521329705, -96017526281,23356125062945,-7240133620964641, 2786977252450841785,-1304375789021987253401, 729394652578427432666225, -480281453260247282387992561] |