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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -12 |
| 3 | 371 |
| 4 | -23212 |
| 5 | 2462221 |
| 6 | -397812162 |
| 7 | 91074108971 |
| 8 | -28061144757112 |
| 9 | 11197923936924121 |
| 10 | -5618483731461136062 |
| 11 | 3461958000431478483671 |
| 12 | -2569952518351298130757012 |
| 13 | 2262189462485360615989843621 |
| 14 | -2329800142118914687262408707962 |
[0,1,-12,371,-23212,2462221,-397812162, 91074108971,-28061144757112,11197923936924121, -5618483731461136062,3461958000431478483671, -2569952518351298130757012, 2262189462485360615989843621, -2329800142118914687262408707962] |