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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 104 |
| 3 | 6784 |
| 4 | 389704 |
| 5 | 290838284 |
| 6 | 1901127404 |
| 7 | 143872363604 |
| 8 | 11292985987784 |
| 9 | 911772753852904 |
| 10 | 5229408282126363304 |
[4,104,6784,389704,290838284,1901127404, 143872363604,11292985987784,911772753852904, 5229408282126363304] |