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 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 131 |
| 5 | 17283 |
| 6 | 298719251 |
| 7 | 89233191216703091 |
| 8 | 7962562414716697755180182566955283 |
| 9 | 63402400208259008611705446682872670539115181497111590988296570564371 |