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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | -5 |
| 4 | 36 |
| 5 | -329 |
| 6 | 3655 |
| 7 | -47844 |
| 8 | 721315 |
| 9 | -12310199 |
| 10 | 234615096 |
| 11 | -4939227215 |
| 12 | 113836841041 |
| 13 | -2850860253240 |
| 14 | 77087063678521 |
| 15 | -2238375706930349 |
| 16 | 69466733978519340 |
| 17 | -2294640596998068569 |
| 18 | 80381887628910919255 |
| 19 | -2976424482866702081004 |
| 20 | 116160936719430292078411 |
[1,0,1,-5,36,-329,3655,-47844,721315,-12310199, 234615096,-4939227215,113836841041,-2850860253240, 77087063678521,-2238375706930349, 69466733978519340,-2294640596998068569, 80381887628910919255,-2976424482866702081004, 116160936719430292078411] |