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 | 1 |
| 2 | 7 |
| 3 | 9 |
| 4 | 38 |
| 5 | 1561 |
| 6 | 3926 |
| 7 | 4958 |
| 8 | 5284 |
| 9 | 9316636 |
| 10 | 84705277923 |
| 11 | 774752630747122741 |
| 12 | 8816203161790126559791912099597266 |
| 13 | 333977591776082560884277873242324869870383615439405188 |