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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 17236524 |
| 4 | 2511603532825176 |
| 5 | 2829059722872229922701920 |
| 6 | 17498057808683351584656839871450000 |
| 7 | 459422439054082909311010463927575656038701920 |
| 8 | 42176005899746902650961357272521722186133207293858938240 |
[1,0,2,17236524,2511603532825176, 2829059722872229922701920, 17498057808683351584656839871450000, 459422439054082909311010463927575656038701920, 42176005899746902650961357272521722186133207293858\ 938240] |