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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | -2 |
| 4 | 6 |
| 5 | 250 |
| 6 | -27090 |
| 7 | -20110502 |
| 8 | 100802987166 |
| 9 | 4068016202512330 |
| 10 | -1476018746725429261650 |
| 11 | -5356258014516256268708458502 |
| 12 | 213804326403655009107321872257070526 |
| 13 | 102412631111025007566217285932140576241712810 |
[1,1,0,-2,6,250,-27090,-20110502,100802987166, 4068016202512330,-1476018746725429261650, -5356258014516256268708458502, 213804326403655009107321872257070526, 102412631111025007566217285932140576241712810] |