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 | 2 |
| 2 | 8 |
| 3 | 4 |
| 4 | 132 |
| 5 | 24 |
| 6 | 1556 |
| 7 | 88 |
| 8 | 5364 |
| 9 | 168 |
| 10 | 5612 |
| 11 | 136 |
| 12 | 1128168 |
| 13 | 28656 |
| 14 | 86804 |
| 15 | 1672 |
| 16 | 3434920 |
| 17 | 48080 |
| 18 | 173886368 |
| 19 | 2462176 |
| 20 | 4093653652 |
| 21 | 62126504 |
| 22 | 4292224444 |
| 23 | 10991336 |
| 24 | 182512332988 |
| 25 | 4948498616 |