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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 29 |
| 5 | 69 |
| 6 | 2079 |
| 7 | 3999 |
| 8 | 6999 |
| 9 | 10677 |
| 10 | 20169 |
| 11 | 10049598 |
| 12 | 20008989 |
| 13 | 100014888 |
| 14 | 100074268 |
[1,3,9,29,69,2079,3999,6999,10677,20169,10049598, 20008989,100014888,100074268] |