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| n | a(n) |
|---|---|
| 0 | 9 |
| 1 | 45 |
| 2 | 285 |
| 3 | 2025 |
| 4 | 15333 |
| 5 | 120825 |
| 6 | 978405 |
| 7 | 8080425 |
| 8 | 67731333 |
| 9 | 574304985 |
| 10 | 4914341925 |
| 11 | 42364319625 |
| 12 | 367428536133 |
| 13 | 3202860761145 |
| 14 | 28037802953445 |
| 15 | 246324856379625 |
| 16 | 2170706132009733 |
| 17 | 19179318935377305 |
| 18 | 169842891165484965 |
| 19 | 1506994510201252425 |
[9,45,285,2025,15333,120825,978405,8080425, 67731333,574304985,4914341925,42364319625, 367428536133,3202860761145,28037802953445, 246324856379625,2170706132009733, 19179318935377305,169842891165484965, 1506994510201252425] |