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) |
|---|---|
| 2 | 1 |
| 3 | 9 |
| 4 | 78 |
| 5 | 657 |
| 6 | 5448 |
| 7 | 49869 |
| 8 | 520416 |
| 9 | 5901138 |
| 10 | 70092000 |
| 11 | 902850273 |
| 12 | 12416814432 |
| 13 | 183763314090 |
| 14 | 2854581512832 |