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 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 60 |
| 4 | 3836 |
| 5 | 37325360 |
| 6 | 25626412263611792 |
| 7 | 67516342973185974276922865448446208 |
| 8 | 2871827610052485009904013737758920847534777143951264797898686184985092096 |