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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 81 |
| 3 | 135 |
| 4 | 297 |
| 5 | 931 |
| 6 | 2569 |
| 7 | 6668 |
| 8 | 17934 |
| 9 | 48674 |
| 10 | 131037 |
| 11 | 353419 |
| 12 | 953231 |
| 13 | 2569308 |
| 14 | 6928326 |
| 15 | 18683550 |
| 16 | 50378075 |
| 17 | 135840557 |
| 18 | 366289949 |
| 19 | 987683660 |
| 20 | 2663241442 |
| 21 | 7181313510 |
| 22 | 19364081749 |
| 23 | 52214352523 |
| 24 | 140793629575 |
| 25 | 379643605448 |
[8,81,135,297,931,2569,6668,17934,48674,131037, 353419,953231,2569308,6928326,18683550,50378075, 135840557,366289949,987683660,2663241442, 7181313510,19364081749,52214352523,140793629575, 379643605448] |