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 | 4 |
| 2 | 24 |
| 3 | 47 |
| 4 | 471 |
| 5 | 487 |
| 6 | 1248 |
| 7 | 1249 |
| 8 | 6248 |
| 9 | 6249 |
| 10 | 6249 |
| 11 | 12493 |
| 12 | 12493 |
| 13 | 12493 |
| 14 | 12493 |
| 15 | 12498 |
| 16 | 31249 |
| 17 | 62499 |
| 18 | 62499 |
| 19 | 62499 |
| 20 | 62499 |
| 21 | 62499 |
| 22 | 62499 |
| 23 | 62499 |
| 24 | 62499 |
| 25 | 62499 |
| 26 | 62499 |
| 27 | 62499 |
| 28 | 62499 |
| 29 | 62499 |
| 30 | 62499 |
| 31 | 62499 |
| 32 | 312497 |
| 33 | 312497 |
| 34 | 312497 |
| 35 | 624984 |
| 36 | 624984 |
| 37 | 624984 |
| 38 | 624984 |
| 39 | 624984 |