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 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 5 |
| 5 | 95 |
| 6 | 137447 |
| 7 | 19092121105 |
| 8 | 1456654254113777258001 |
| 9 | 8728918703159963392919895262580124849062181 |