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 | 4 |
| 1 | 9 |
| 2 | 65 |
| 3 | 11665 |
| 4 | 27289 |
| 5 | 3030569 |
| 6 | 6808609 |
| 7 | 1632201497 |
| 8 | 10553247449 |
| 9 | 843404126561 |
| 10 | 2101614761177 |
| 11 | 62537392166201 |
| 12 | 100301302204489 |