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 | 0 |
| 2 | 3 |
| 3 | 3 |
| 4 | 61 |
| 5 | 25 |
| 6 | 137 |
| 7 | 343 |
| 8 | 32663 |
| 9 | 2357 |
| 10 | 74689 |
| 11 | 66671 |
| 12 | 5299069 |
| 13 | 2416531 |
| 14 | 115545821 |
| 15 | 106974277 |
| 16 | 637525199 |
| 17 | 74575583 |
| 18 | 1588674349 |
| 19 | 4496071973 |
| 20 | 3234136824109 |
| 21 | 1535024393629 |
| 22 | 5843920343363 |
| 23 | 5575228585159 |
| 24 | 1961561381531581 |
| 25 | 93953561866435 |
| 26 | 9016382638527647 |
| 27 | 2888981280567587 |
| 28 | 200248741591132607 |
| 29 | 96525489421136333 |