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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 80 |
| 3 | 629 |
| 4 | 4633 |
| 5 | 34872 |
| 6 | 260924 |
| 7 | 1955750 |
| 8 | 14651847 |
| 9 | 109783269 |
| 10 | 822547725 |
| 11 | 6162992737 |
| 12 | 46176452589 |
| 13 | 345979170190 |
| 14 | 2592263829464 |
| 15 | 19422650189445 |
| 16 | 145525052534819 |
| 17 | 1090352803546358 |
| 18 | 8169515919608631 |
| 19 | 61210454258421286 |
[13,80,629,4633,34872,260924,1955750,14651847, 109783269,822547725,6162992737,46176452589, 345979170190,2592263829464,19422650189445, 145525052534819,1090352803546358,8169515919608631, 61210454258421286] |