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 | 5 |
| 1 | 11 |
| 2 | 59 |
| 3 | 1621 |
| 4 | 821647 |
| 5 | 104484802069 |
| 6 | 870566678511500413589 |