| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 85 |
| 4 | 1030 |
| 5 | 13011 |
| 6 | 165924 |
| 7 | 2121033 |
| 8 | 27129985 |
| 9 | 347071157 |
| 10 | 4440219758 |
| 11 | 56806066313 |
| 12 | 726751710350 |
| 13 | 9297746189765 |
| 14 | 118951351657555 |
| 15 | 1521812314158867 |
| 16 | 19469410910818078 |
| 17 | 249083253366686135 |
| 18 | 3186663809907191548 |
[1,8,85,1030,13011,165924,2121033,27129985, 347071157,4440219758,56806066313,726751710350, 9297746189765,118951351657555,1521812314158867, 19469410910818078,249083253366686135, 3186663809907191548] |