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 | 1 |
| 2 | 6 |
| 3 | 24 |
| 4 | 2016 |
| 5 | 30720 |
| 6 | 98304 |
| 7 | 536739840 |
| 8 | 576460751766552576 |
| 9 | 154742504334211782058967040 |
| 10 | 40564664464798430175360140181504 |
| 11 | 42535255300298100629580978034468454400 |