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 | 11 |
| 2 | 41 |
| 3 | 4111 |
| 4 | 4441 |
| 5 | 11411 |
| 6 | 14411 |
| 7 | 41141 |
| 8 | 41411 |
| 9 | 44111 |
| 10 | 1114111 |
| 11 | 1144141 |
| 12 | 1144441 |
| 13 | 1411141 |
| 14 | 1411411 |
| 15 | 1441411 |
| 16 | 1444111 |
| 17 | 1444411 |
| 18 | 1444441 |
| 19 | 4141441 |
| 20 | 4414411 |
| 21 | 4441111 |
| 22 | 4441441 |
| 23 | 11111141 |
| 24 | 11141111 |
| 25 | 11141441 |
| 26 | 11441141 |
| 27 | 11441411 |
| 28 | 14111441 |
| 29 | 14141411 |