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 | 3 |
| 2 | 5 |
| 3 | 17 |
| 4 | 107 |
| 5 | 15017 |
| 6 | 3234846617 |
| 7 | 100280245067 |
| 8 | 3710369067407 |
| 9 | 307444891294245707 |
| 10 | 961380175077106319537 |
| 11 | 139867498408927468089138080936033904837498617 |