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 | 4 |
| 3 | 24 |
| 4 | 144 |
| 5 | 908 |
| 6 | 6117 |
| 7 | 44159 |
| 8 | 332775 |
| 9 | 2592589 |
| 10 | 20758019 |
| 11 | 169922924 |
| 12 | 1416703346 |
| 13 | 11992874160 |
| 14 | 10283824252 |