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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 241 |
| 4 | 742 |
| 5 | 2760 |
| 6 | 8465 |
| 7 | 24317 |
| 8 | 73405 |
| 9 | 214117 |
| 10 | 601411 |
| 11 | 1698702 |
| 12 | 4766632 |
| 13 | 13156641 |
| 14 | 36175599 |
| 15 | 99198867 |
| 16 | 270109351 |
| 17 | 732494449 |
| 18 | 1982055330 |
| 19 | 5345239912 |
| 20 | 14374634237 |
| 21 | 38587852393 |
| 22 | 103391960861 |
| 23 | 276535572481 |
| 24 | 738655032563 |
[9,81,241,742,2760,8465,24317,73405,214117,601411, 1698702,4766632,13156641,36175599,99198867, 270109351,732494449,1982055330,5345239912, 14374634237,38587852393,103391960861,276535572481, 738655032563] |