| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 59 |
| 3 | 381 |
| 4 | 3684 |
| 5 | 8692 |
| 6 | 70381 |
| 7 | 122292 |
| 8 | 3762381 |
| 9 | 7453707 |
| 10 | 18856074 |
| 11 | 124721736 |
| 12 | 587838545 |
| 13 | 3996943276 |
| 14 | 18845571218 |
| 15 | 27483805332 |
| 16 | 394393554074 |
| 17 | 1246890354231 |
| 18 | 11642661866667 |
[12,59,381,3684,8692,70381,122292,3762381,7453707, 18856074,124721736,587838545,3996943276, 18845571218,27483805332,394393554074, 1246890354231,11642661866667] |