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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 80 |
| 3 | 1285 |
| 4 | 17831 |
| 5 | 228289 |
| 6 | 2782857 |
| 7 | 32828532 |
| 8 | 378285281 |
| 9 | 4282852764 |
| 10 | 47828527596 |
| 11 | 528285275911 |
| 12 | 5782852759055 |
| 13 | 62828527590491 |
| 14 | 678285275904845 |
| 15 | 7282852759048382 |
| 16 | 77828527590483750 |
[1,4,80,1285,17831,228289,2782857,32828532, 378285281,4282852764,47828527596,528285275911, 5782852759055,62828527590491,678285275904845, 7282852759048382,77828527590483750] |