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 | 4 |
| 3 | 23 |
| 4 | 4500 |
| 5 | 23314202 |
| 6 | 703143261541584 |
| 7 | 580028504455491926110281336263 |
| 8 | 471554575224119231041268294704259548817134505334232514876247 |