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 | 1 |
| 3 | 1 |
| 4 | 242 |
| 5 | 3624 |
| 6 | 22020 |
| 7 | 671346 |
| 8 | 8870024 |
| 9 | 49250144 |
| 10 | 463239475 |
| 11 | 1407472722 |
| 12 | 82462576220 |
| 13 | 82462576220 |
| 14 | 5907695879319 |