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) |
|---|---|
| 0 | 6 |
| 1 | 48 |
| 2 | 390 |
| 3 | 3216 |
| 4 | 26844 |
| 5 | 229584 |
| 6 | 2006736 |
| 7 | 17809008 |
| 8 | 159799812 |
| 9 | 1446245424 |
| 10 | 13181330772 |
| 11 | 120849559824 |
| 12 | 1113598633188 |