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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 313 |
| 3 | 895 |
| 4 | 8431 |
| 5 | 41446 |
| 6 | 301533 |
| 7 | 1847322 |
| 8 | 12314089 |
| 9 | 80678010 |
| 10 | 526137481 |
| 11 | 3481542013 |
| 12 | 22776996398 |
| 13 | 150218677027 |
| 14 | 986628682316 |
| 15 | 6493406925686 |
| 16 | 42707158770594 |
| 17 | 280923646529256 |
| 18 | 1848097254303284 |
| 19 | 12156318968086178 |
[3,313,895,8431,41446,301533,1847322,12314089, 80678010,526137481,3481542013,22776996398, 150218677027,986628682316,6493406925686, 42707158770594,280923646529256,1848097254303284, 12156318968086178] |