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 | 4 |
| 2 | 2 |
| 3 | 52 |
| 4 | 112 |
| 5 | 4544 |
| 6 | 16334 |
| 7 | 1129682 |
| 8 | 5464208 |
| 9 | 458459214 |
| 10 | 2605975384 |
| 11 | 253569083138 |
| 12 | 1617730690396 |