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 | 6 |
| 2 | 234 |
| 3 | 12813606 |
| 4 | 2103846732371087589834 |
| 5 | 9311985549495522884757461748592522243432897275494229148348315206 |