| n | a(n) |
|---|---|
| 1 | 105 |
| 2 | 435 |
| 3 | 1817 |
| 4 | 7587 |
| 5 | 31677 |
| 6 | 132263 |
| 7 | 552247 |
| 8 | 2305835 |
| 9 | 9627715 |
| 10 | 40199277 |
| 11 | 167846875 |
| 12 | 700822891 |
| 13 | 2926195229 |
| 14 | 12217949255 |
| 15 | 51014464969 |
| 16 | 213004292437 |
| 17 | 889371840403 |
| 18 | 3713456951747 |
| 19 | 15505058633553 |
| 20 | 64739364520389 |
[105,435,1817,7587,31677,132263,552247,2305835, 9627715,40199277,167846875,700822891,2926195229, 12217949255,51014464969,213004292437,889371840403, 3713456951747,15505058633553,64739364520389] |