The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 111 |
| 3 | 1 |
| 4 | 111 |
| 5 | 11211 |
| 6 | 111 |
| 7 | 1 |
| 8 | 111 |
| 9 | 11211 |
| 10 | 1123211 |
| 11 | 11211 |
| 12 | 111 |
| 13 | 1 |
| 14 | 111 |
| 15 | 11211 |
| 16 | 1123211 |
| 17 | 112343211 |
| 18 | 1123211 |
| 19 | 11211 |
| 20 | 111 |
| 21 | 1 |
[1,111,1,111,11211,111,1,111,11211,1123211,11211, 111,1,111,11211,1123211,112343211,1123211,11211, 111,1] |