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 | 2 |
| 2 | 23 |
| 3 | 239 |
| 4 | 23911 |
| 5 | 2391113 |
| 6 | 239111363 |
| 7 | 23911136351 |
| 8 | 2391113635129 |
| 9 | 239111363512969 |
| 10 | 23911136351296933 |
| 11 | 2391113635129693349 |
| 12 | 2391113635129693349159 |
| 13 | 239111363512969334915917 |