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 | 6274633 |
| 2 | 3405994336744928448432949523054569 |
| 3 | 469545242509890879708897137286442565790534241 |