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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 14474 |
| 4 | 131204813713122 |
| 5 | 132431858995585724536583901671708647 |
| 6 | 20717425607872632053632351670738034346764162305716050849113959210873829416 |