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 | 5 |
| 3 | 221 |
| 4 | 331997 |
| 5 | 24883531997 |
| 6 | 139314094387531997 |
| 7 | 82606411393217618227531997 |
| 8 | 6984964247224120535022357995827531997 |
| 9 | 109110688415578301444592123476429107940843827531997 |