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 | 31 |
| 3 | 181 |
| 4 | 733 |
| 5 | 1777 |
| 6 | 8363 |
| 7 | 8369 |
| 8 | 19273 |
| 9 | 175333 |
| 10 | 175349 |
| 11 | 33952819 |
| 12 | 4377722977 |
| 13 | 4377723013 |
| 14 | 1242030992717 |
| 15 | 1242030992723 |