The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 11 |
| 3 | 110 |
| 4 | 111 |
| 5 | 202 |
| 6 | 1100 |
| 7 | 1110 |
| 8 | 1111 |
| 9 | 2020 |
| 10 | 2222 |
| 11 | 3003 |
| 12 | 3113 |
| 13 | 11000 |
| 14 | 11011 |
| 15 | 11100 |
| 16 | 11110 |
| 17 | 11111 |
| 18 | 11202 |
| 19 | 20200 |
| 20 | 20202 |
| 21 | 20211 |
| 22 | 22220 |
| 23 | 22222 |
| 24 | 23203 |
| 25 | 30030 |
| 26 | 30232 |
| 27 | 31130 |
| 28 | 33033 |
| 29 | 40004 |
| 30 | 40114 |
| 31 | 41104 |
| 32 | 41114 |
| 33 | 42024 |
| 34 | 110000 |
| 35 | 110011 |
| 36 | 110110 |
| 37 | 110111 |
| 38 | 110202 |
| 39 | 111000 |
[0,11,110,111,202,1100,1110,1111,2020,2222,3003, 3113,11000,11011,11100,11110,11111,11202,20200, 20202,20211,22220,22222,23203,30030,30232,31130, 33033,40004,40114,41104,41114,42024,110000,110011, 110110,110111,110202,111000] |