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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | -22 |
| 3 | 2 |
| 4 | 60482 |
| 5 | -4838398 |
| 6 | 119750402 |
| 7 | 7264857602 |
| 8 | -348713164798 |
| 9 | 4268249137152002 |
| 10 | -2020660279013375998 |
| 11 | 327387513566969856002 |
| 12 | -17234677825923317759998 |
| 13 | 20004536762232422400002 |
| 14 | 12702000644400049997414400002 |
| 15 | -4420880996869850977271807999998 |
| 16 | 55184528880536814259678111334400002 |
| 17 | -98410947805609541237532965260492799998 |
| 18 | 61998887798316869577999908025139200000002 |
[1,4,-22,2,60482,-4838398,119750402,7264857602, -348713164798,4268249137152002, -2020660279013375998,327387513566969856002, -17234677825923317759998,20004536762232422400002, 12702000644400049997414400002, -4420880996869850977271807999998, 55184528880536814259678111334400002, -98410947805609541237532965260492799998, 61998887798316869577999908025139200000002] |