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 | 2 |
| 3 | 10 |
| 4 | 68 |
| 5 | 546 |
| 6 | 4872 |
| 7 | 46782 |
| 8 | 474180 |
| 9 | 5010456 |
| 10 | 54721224 |
| 11 | 613912182 |
| 12 | 7042779996 |
| 13 | 82329308040 |
| 14 | 978034001472 |