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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 89 |
| 3 | 81 |
| 4 | 525 |
| 5 | 8262 |
| 6 | 25663 |
| 7 | 148323 |
| 8 | 1480037 |
| 9 | 7361668 |
| 10 | 43625889 |
| 11 | 337487030 |
| 12 | 1992491986 |
| 13 | 12259297662 |
| 14 | 84919942819 |
| 15 | 531642104603 |
| 16 | 3345439670726 |
| 17 | 22164717425170 |
| 18 | 141438239886755 |
| 19 | 900411960327132 |
| 20 | 5860940525461256 |
[5,89,81,525,8262,25663,148323,1480037,7361668, 43625889,337487030,1992491986,12259297662, 84919942819,531642104603,3345439670726, 22164717425170,141438239886755,900411960327132, 5860940525461256] |