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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 356 |
| 3 | 2820 |
| 4 | 523936 |
| 5 | 18655220 |
| 6 | 1480839364 |
| 7 | 79624748768 |
| 8 | 5187293040908 |
| 9 | 307729928208180 |
| 10 | 19115615460927472 |
| 11 | 1161044841496720396 |
| 12 | 71301912726439945596 |
| 13 | 4355237502171618351824 |
| 14 | 266729318902157988715636 |
[0,356,2820,523936,18655220,1480839364, 79624748768,5187293040908,307729928208180, 19115615460927472,1161044841496720396, 71301912726439945596,4355237502171618351824, 266729318902157988715636] |