This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 101 |
| 4 | 111 |
| 5 | 212 |
| 6 | 313 |
| 7 | 515 |
| 8 | 10001 |
| 9 | 10101 |
| 10 | 11111 |
| 11 | 12121 |
| 12 | 20102 |
| 13 | 21112 |
| 14 | 23132 |
| 15 | 24142 |
| 16 | 32123 |
| 17 | 36163 |
| 18 | 42124 |
| 19 | 44144 |
| 20 | 63136 |
| 21 | 69196 |
| 22 | 77177 |
| 23 | 96169 |
| 24 | 99199 |
| 25 | 1000001 |
| 26 | 1001001 |
| 27 | 1011101 |
| 28 | 1041401 |
| 29 | 1101011 |
| 30 | 1111111 |
| 31 | 1131311 |
| 32 | 1141411 |
| 33 | 1221221 |