The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 10 |
| 11 | 12 |
| 12 | 32 |
| 13 | 34 |
| 14 | 54 |
| 15 | 56 |
| 16 | 76 |
| 17 | 78 |
| 18 | 98 |
| 19 | 910 |
| 20 | 1210 |
| 21 | 1232 |
| 22 | 3432 |
| 23 | 3454 |
| 24 | 5654 |
| 25 | 5676 |
| 26 | 7876 |
| 27 | 7898 |
| 28 | 91098 |
| 29 | 9101210 |
| 30 | 12321210 |
| 31 | 12323432 |
| 32 | 34543432 |
| 33 | 34545654 |
| 34 | 56765654 |
| 35 | 56767876 |
| 36 | 78987876 |
| 37 | 789891098 |
| 38 | 910121091098 |
| 39 | 910121012321210 |
| 40 | 1232343212321210 |
[0,1,2,3,4,5,6,7,8,9,10,12,32,34,54,56,76,78,98, 910,1210,1232,3432,3454,5654,5676,7876,7898,91098, 9101210,12321210,12323432,34543432,34545654, 56765654,56767876,78987876,789891098,910121091098, 910121012321210,1232343212321210] |