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 | 2221 |
| 2 | 31 |
| 3 | 555555555551 |
| 4 | 71 |
| 5 | 1111111111111111111 |
| 6 | 131 |
| 7 | 1717171717171717171717171717171 |
| 8 | 191 |
| 9 | 2323231 |
| 10 | 29292929291 |
| 11 | 311 |
| 12 | 3737373737373737373737371 |
| 13 | 41411 |
| 14 | 431 |