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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 4 |
| 7 | 26 |
| 8 | 375 |
| 9 | 11495 |
| 10 | 613092 |
| 11 | 48185341 |
| 12 | 5116473573 |
| 13 | 698241355081 |