| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 27 |
| 3 | 96 |
| 4 | 241 |
| 5 | 672 |
| 6 | 1499 |
| 7 | 3676 |
| 8 | 7644 |
| 9 | 17398 |
| 10 | 34369 |
| 11 | 74512 |
| 12 | 141615 |
| 13 | 296939 |
| 14 | 546394 |
| 15 | 1119562 |
| 16 | 2004015 |
| 17 | 4043156 |
| 18 | 7047626 |
| 19 | 14102481 |
| 20 | 23956166 |
| 21 | 47809422 |
| 22 | 79011279 |
| 23 | 158359672 |
| 24 | 254037643 |
| 25 | 514524887 |
| 26 | 796972392 |
| 27 | 1646320650 |
[1,8,27,96,241,672,1499,3676,7644,17398,34369, 74512,141615,296939,546394,1119562,2004015, 4043156,7047626,14102481,23956166,47809422, 79011279,158359672,254037643,514524887,796972392, 1646320650] |