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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 31 |
| 6 | 7 |
| 7 | 31 |
| 8 | 1 |
| 9 | 1417 |
| 10 | 391 |
| 11 | 158341 |
| 12 | 7 |
| 13 | 15873901 |
| 14 | 14001 |
| 15 | 842422057 |
| 16 | 579379362 |
| 17 | 56336866681 |
| 18 | 46619148182102 |
| 19 | 778545853570143 |
| 20 | 178899570114917382 |
| 21 | 3463518647447701366 |
| 22 | 503865540593731411886 |
| 23 | 11759574310854845083219 |
| 24 | 1403272743542390575650072 |