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 | 2 |
| 3 | 8 |
| 4 | 180 |
| 5 | 612032 |
| 6 | 200253854316544 |
| 7 | 263735716028826427534807159537664 |
| 8 | 5609038300883759793482640992086670066760184863720423808367168537493504 |