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 | 2 |
| 2 | 32 |
| 3 | 9216 |
| 4 | 84934656 |
| 5 | 39137889484800 |
| 6 | 1298501242170900480000 |
| 7 | 4221953171600428240994304000000 |
| 8 | 1757091687362157576297527910177177600000000 |