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 | 7 |
| 4 | -791 |
| 5 | -3748629 |
| 6 | 151648960887729 |
| 7 | -1323497544567561138595307148089 |
| 8 | 41444465282455711991644958522615049159671653083333293470875123 |