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 | 5 |
| 3 | 13 |
| 4 | 41 |
| 5 | 1093 |
| 6 | 797161 |
| 7 | 21523361 |
| 8 | 926510094425921 |
| 9 | 1716841910146256242328924544641 |
| 10 | 3754733257489862401973357979128773 |
| 11 | 6957596529882152968992225251835887181478451547013 |