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 | 1333 |
| 2 | 1909 |
| 3 | 2469601 |
| 4 | 893748277 |
| 5 | 322685352001 |
| 6 | 8992165119733 |
| 7 | 42052982615431201 |