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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 126 |
| 4 | 196 |
| 5 | 504 |
| 6 | 1296 |
| 7 | 3312 |
| 8 | 8464 |
| 9 | 21712 |
| 10 | 55696 |
| 11 | 142544 |
| 12 | 364816 |
| 13 | 934992 |
| 14 | 2396304 |
| 15 | 6136272 |
| 16 | 15713296 |
| 17 | 40258384 |
| 18 | 103144336 |
| 19 | 264177872 |
| 20 | 676624144 |
| 21 | 1733335632 |
| 22 | 4440356496 |
| 23 | 11373699024 |
| 24 | 29133027856 |
| 25 | 74627823952 |
| 26 | 191168323984 |
[9,81,126,196,504,1296,3312,8464,21712,55696, 142544,364816,934992,2396304,6136272,15713296, 40258384,103144336,264177872,676624144,1733335632, 4440356496,11373699024,29133027856,74627823952, 191168323984] |