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 | 1 |
| 2 | 21 |
| 3 | 171 |
| 4 | 1711 |
| 5 | 2211 |
| 6 | 72771 |
| 7 | 121771 |
| 8 | 222111 |
| 9 | 712221 |
| 10 | 22221111 |
| 11 | 72222171 |
| 12 | 2222211111 |
| 13 | 12177127711 |
| 14 | 72177771711 |
| 15 | 171277217121 |
| 16 | 222222111111 |
| 17 | 22222221111111 |
| 18 | 121727717277211 |
| 19 | 2222222211111111 |
| 20 | 22117121117271271 |
| 21 | 222222222111111111 |
| 22 | 12172172111271712221 |