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 | 14 |
| 3 | 741 |
| 4 | 87024 |
| 5 | 18068505 |
| 6 | 5845458528 |
| 7 | 2718866959893 |
| 8 | 1719570636306432 |
| 9 | 1419543579377755377 |
| 10 | 1482454643117692608000 |
| 11 | 1910657530214126188243749 |
| 12 | 2978927846824451394372304896 |
| 13 | 5526241720077994999033052180169 |