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 | 4 |
| 2 | 122 |
| 3 | 461162 |
| 4 | 3349129245910 |
| 5 | 13840887520563432756263419 |
| 6 | 382957446908718393433860815845544980690400109047234 |
| 7 | 288920912135538937886184184636581882706344572318014211901988926906547123182498092010284597493565283044 |