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 | 8 |
| 1 | 15 |
| 2 | 127 |
| 3 | 15247 |
| 4 | 232364287 |
| 5 | 53993160246468367 |
| 6 | 2915261353400811631533974206368127 |
| 7 | 8498748758632331927648392184620600167779995785955324343380396911247 |