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 | 1 |
| 2 | 4 |
| 3 | 401 |
| 4 | 250031 |
| 5 | 851787199 |
| 6 | 15835552812749 |
| 7 | 1606578861528554441 |
| 8 | 889483369334451647489771 |
| 9 | 2687450673445984030296455830409 |