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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 93 |
| 3 | 723 |
| 4 | 5437 |
| 5 | 40323 |
| 6 | 297469 |
| 7 | 2191875 |
| 8 | 16164861 |
| 9 | 119443459 |
| 10 | 884719613 |
| 11 | 6570430467 |
| 12 | 48927031293 |
| 13 | 365303660547 |
| 14 | 2734459846653 |
| 15 | 20518848036867 |
| 16 | 154328140087293 |
| 17 | 1163305103130627 |
| 18 | 8787088644243453 |
[1,11,93,723,5437,40323,297469,2191875,16164861, 119443459,884719613,6570430467,48927031293, 365303660547,2734459846653,20518848036867, 154328140087293,1163305103130627,8787088644243453] |