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 | 1 |
| 2 | 23 |
| 3 | 11 |
| 4 | 3 |
| 5 | 9 |
| 6 | 15 |
| 7 | 33 |
| 8 | 91 |
| 9 | 299 |
| 10 | 213 |
| 11 | 1383 |
| 12 | 3091 |
| 13 | 8129 |
| 14 | 81 |
| 15 | 45 |
| 16 | 243 |
| 17 | 3175 |
| 18 | 2523 |
| 19 | 3682662467 |
| 20 | 164406964254894462023 |