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 | 24 |
| 3 | 736 |
| 4 | 486200 |
| 5 | 15717093608 |
| 6 | 41301356272912040 |
| 7 | 12775545227876350768099688 |
| 8 | 645382645785863222088428068265093848 |
| 9 | 6899505383250315051751361998008633233501722290328 |