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 | 877 |
| 4 | 27644437 |
| 5 | 35742549198872617291353508656626642567 |
| 6 | 359334085968622831041960188598043661065388726959079837 |