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 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 21 |
| 7 | 24 |
| 8 | 248 |
| 9 | 481 |
| 10 | 681 |
| 11 | 6212 |
| 12 | 16212 |
| 13 | 42421 |
| 14 | 242484 |
| 15 | 842484 |
| 16 | 8168168 |
| 17 | 48168162 |
| 18 | 121621216 |
| 19 | 816212162 |
| 20 | 1242421242 |
| 21 | 4212162124 |
| 22 | 24212424848 |
| 23 | 42484842421 |
| 24 | 242484842484 |
| 25 | 816816848168 |
| 26 | 1684842484816 |
| 27 | 8168481681621 |