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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 11 |
| 3 | 65 |
| 4 | 386 |
| 5 | 2315 |
| 6 | 13886 |
| 7 | 83315 |
| 8 | 499886 |
| 9 | 2999315 |
| 10 | 17995886 |
| 11 | 107975315 |
| 12 | 647851886 |
| 13 | 3887111315 |
| 14 | 23322667886 |
| 15 | 139936007315 |
| 16 | 839616043886 |
| 17 | 5037696263315 |
| 18 | 30226177579886 |
| 19 | 181357065479315 |
| 20 | 1088142392875886 |
[3,11,65,386,2315,13886,83315,499886,2999315, 17995886,107975315,647851886,3887111315, 23322667886,139936007315,839616043886, 5037696263315,30226177579886,181357065479315, 1088142392875886] |