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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 46 |
| 5 | 2112 |
| 6 | 4460539 |
| 7 | 19896408170515 |
| 8 | 395867058087736049315365218 |
| 9 | 156710727679038987453730700439845485538142584724187516 |