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 | 2 |
| 3 | 23 |
| 4 | 223 |
| 5 | 233 |
| 6 | 237 |
| 7 | 2237 |
| 8 | 2337 |
| 9 | 22337 |
| 10 | 23137 |
| 11 | 23337 |
| 12 | 23373 |
| 13 | 23797 |
| 14 | 223373 |
| 15 | 223797 |
| 16 | 231373 |
| 17 | 233137 |
| 18 | 233797 |
| 19 | 2233797 |
| 20 | 2313797 |
| 21 | 2331373 |
| 22 | 2333797 |
| 23 | 2337379 |
| 24 | 2337397 |
| 25 | 2353797 |
| 26 | 22353797 |
| 27 | 22373797 |
| 28 | 23137397 |
| 29 | 23173797 |
| 30 | 23313797 |
| 31 | 23353797 |
| 32 | 23373797 |