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 | 5 |
| 2 | 29 |
| 3 | 139 |
| 4 | 12011 |
| 5 | 5651707681619 |
| 6 | 386971244197199 |
| 7 | 35257120210449712895193719 |
| 8 | 815027488562171580969632861193966578650499 |