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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 1547 |
| 7 | 21609301 |
| 8 | 733351105935 |
| 9 | 42700033549946255 |
| 10 | 4073194598236125134140 |
| 11 | 613969628444792223023625238 |
| 12 | 141515621596238755267618266465449 |
[1,0,0,0,1,5,1547,21609301,733351105935, 42700033549946255,4073194598236125134140, 613969628444792223023625238, 141515621596238755267618266465449] |