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 | 2 |
| 2 | 83 |
| 3 | 1979 |
| 4 | 2081 |
| 5 | 2326469 |
| 6 | 6356923 |
| 7 | 7170679 |
| 8 | 63812027 |
| 9 | 4652001719 |
| 10 | 241949473277 |
| 11 | 163220642765623 |
| 12 | 1260677492111911 |
| 13 | 8150959175977039 |