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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 14 |
| 2 | 1411 |
| 3 | 211411 |
| 4 | 21142112 |
| 5 | 122112142112 |
| 6 | 122112141112212211 |
| 7 | 2122112231141112212211 |
| 8 | 21221122311421132221221112 |
| 9 | 12312211321321121421132221221112 |
[4,14,1411,211411,21142112,122112142112, 122112141112212211,2122112231141112212211, 21221122311421132221221112, 12312211321321121421132221221112] |