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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 14 |
| 3 | 34 |
| 4 | 144 |
| 5 | 344 |
| 6 | 1444 |
| 7 | 3444 |
| 8 | 14444 |
| 9 | 34444 |
| 10 | 144444 |
| 11 | 344444 |
| 12 | 1444444 |
| 13 | 3444444 |
| 14 | 14444444 |
| 15 | 34444444 |
| 16 | 144444444 |
| 17 | 344444444 |
| 18 | 1444444444 |
| 19 | 3444444444 |
| 20 | 14444444444 |
| 21 | 34444444444 |
| 22 | 144444444444 |
| 23 | 344444444444 |
| 24 | 1444444444444 |
[1,3,14,34,144,344,1444,3444,14444,34444,144444, 344444,1444444,3444444,14444444,34444444, 144444444,344444444,1444444444,3444444444, 14444444444,34444444444,144444444444,344444444444, 1444444444444] |