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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 33 |
| 3 | 100 |
| 4 | 315 |
| 5 | 961 |
| 6 | 3024 |
| 7 | 9409 |
| 8 | 29319 |
| 9 | 91204 |
| 10 | 284279 |
| 11 | 885481 |
| 12 | 2758192 |
| 13 | 8590761 |
| 14 | 26760591 |
| 15 | 83356900 |
| 16 | 259648623 |
| 17 | 808776721 |
| 18 | 2519272112 |
| 19 | 7847302225 |
| 20 | 24443615655 |
| 21 | 76139572356 |
| 22 | 237167776135 |
| 23 | 738755721081 |
| 24 | 2301155717168 |
| 25 | 7167887098681 |
[9,33,100,315,961,3024,9409,29319,91204,284279, 885481,2758192,8590761,26760591,83356900, 259648623,808776721,2519272112,7847302225, 24443615655,76139572356,237167776135,738755721081, 2301155717168,7167887098681] |