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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 126 |
| 3 | 1299 |
| 4 | 14211 |
| 5 | 136611 |
| 6 | 1373127 |
| 7 | 12838293 |
| 8 | 122478147 |
| 9 | 1129559068 |
| 10 | 10495764324 |
| 11 | 95773104459 |
| 12 | 877873080195 |
| 13 | 7963150929030 |
| 14 | 72400207009635 |
| 15 | 654588661768353 |
| 16 | 5924851016703093 |
| 17 | 53460853371243261 |
| 18 | 482688774419853026 |
| 19 | 4350478100196378069 |
| 20 | 39224153751141474936 |
[1,9,126,1299,14211,136611,1373127,12838293, 122478147,1129559068,10495764324,95773104459, 877873080195,7963150929030,72400207009635, 654588661768353,5924851016703093, 53460853371243261,482688774419853026, 4350478100196378069,39224153751141474936] |