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) |
|---|---|
| 0 | 2 |
| 1 | 5 |
| 2 | 9 |
| 3 | 89 |
| 4 | 8009 |
| 5 | 64152089 |
| 6 | 4115490587216009 |
| 7 | 16937262773463574696951813104089 |