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 | 21 |
| 2 | 1225 |
| 3 | 23220 |
| 4 | 212226 |
| 5 | 22121226 |
| 6 | 2202322528 |
| 7 | 21222223210 |
| 8 | 202222242820 |
| 9 | 22122952222920 |
| 10 | 229222922294226 |
| 11 | 2221228522222920 |
| 12 | 222322222025202925 |
| 13 | 222212284222222920 |
| 14 | 22222122841222222920 |
| 15 | 2092226022222222442221 |
| 16 | 22222222042522220020225 |
| 17 | 622222207421222222222253 |
| 18 | 22222212062122272422225226 |