The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 12 |
| 4 | 122 |
| 5 | 1221 |
| 6 | 12213 |
| 7 | 122132 |
| 8 | 1221321 |
| 9 | 12213211 |
| 10 | 386215660 |
| 11 | 12213211555 |
| 12 | 386215660604 |
| 13 | 12213211555380 |
| 14 | 386215660604902 |
| 15 | 12213211555380554 |
| 16 | 386215660604902322 |
| 17 | 12213211555380554371 |
| 18 | 386215660604902322908 |
[1,3,12,122,1221,12213,122132,1221321,12213211, 386215660,12213211555,386215660604,12213211555380, 386215660604902,12213211555380554, 386215660604902322,12213211555380554371, 386215660604902322908] |