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 | 4 |
| 2 | 6 |
| 3 | 23 |
| 4 | 496 |
| 5 | 2275974 |
| 6 | 800648638402240 |
| 7 | 1054942853799126580390222487977120 |
| 8 | 22436153203535039105819651040959324360753617244078062654624560815030272 |