The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 1121 |
| 4 | 1121211211 |
| 5 | 112121121121121112211221 |
| 6 | 112121121121121112211221211211122112211221123122212211 |
[1,11,1121,1121211211,112121121121121112211221, 11212112112112111221122121121112211221122112312221\ 2211] |