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 | 2 |
| 4 | 10 |
| 5 | 69 |
| 6 | 807 |
| 7 | 13048 |
| 8 | 269221 |
| 9 | 6660455 |
| 10 | 191411477 |
| 11 | 6257905519 |
| 12 | 229312906604 |
| 13 | 9309547057292 |
| 14 | 414803750101863 |