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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -4 |
| 2 | -57 |
| 3 | 299 |
| 4 | 30837 |
| 5 | -292681 |
| 6 | -44960517 |
| 7 | 602623139 |
| 8 | 123352145097 |
| 9 | -2127680509201 |
| 10 | -544363629609777 |
| 11 | 11477378893703579 |
| 12 | 3523737902837036157 |
| 13 | -87803678236749285721 |
| 14 | -31449956002350199275837 |
| 15 | 904227259824093176473619 |
| 16 | 370149219545412046573408017 |
[1,-4,-57,299,30837,-292681,-44960517,602623139, 123352145097,-2127680509201,-544363629609777, 11477378893703579,3523737902837036157, -87803678236749285721,-31449956002350199275837, 904227259824093176473619, 370149219545412046573408017] |