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 | 9 |
| 1 | 22599 |
| 2 | 782534990456559999 |
| 3 | 1124958024440103533642098279435875957333450115658804731260154201599999999 |