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 | 536870911 |
| 2 | 8796093022207 |
| 3 | 140737488355327 |
| 4 | 9007199254740991 |
| 5 | 2361183241434822606847 |
| 6 | 9444732965739290427391 |
| 7 | 604462909807314587353087 |