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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | -7 |
| 3 | 74 |
| 4 | -820 |
| 5 | 10196 |
| 6 | -134785 |
| 7 | 1860668 |
| 8 | -26508457 |
| 9 | 386843804 |
| 10 | -5753126477 |
| 11 | 86878155652 |
| 12 | -1328593620692 |
| 13 | 20533664196478 |
| 14 | -320220157730975 |
| 15 | 5032648114664896 |
| 16 | -79629405527982623 |
| 17 | 1267425784159379572 |
| 18 | -20279086501234998596 |
| 19 | 325989622456860054852 |
[1,2,-7,74,-820,10196,-134785,1860668,-26508457, 386843804,-5753126477,86878155652,-1328593620692, 20533664196478,-320220157730975,5032648114664896, -79629405527982623,1267425784159379572, -20279086501234998596,325989622456860054852] |