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 | 41 |
| 2 | 14441411 |
| 3 | 41414411 |
| 4 | 44114141 |
| 5 | 1144141441 |
| 6 | 1144144411 |
| 7 | 1144441141 |
| 8 | 1411414441 |
| 9 | 1441411441 |
| 10 | 1441444111 |
| 11 | 1444114141 |
| 12 | 4111144441 |
| 13 | 4111444411 |
| 14 | 4114414141 |
| 15 | 4141141441 |
| 16 | 4141144141 |
| 17 | 4144111441 |
| 18 | 4411114441 |
| 19 | 4411144141 |
| 20 | 4411414411 |
| 21 | 4414141141 |
| 22 | 4414441111 |