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 | 8 |
| 2 | 184 |
| 3 | 8448 |
| 4 | 648576 |
| 5 | 74972160 |
| 6 | 12174658560 |
| 7 | 2643856588800 |
| 8 | 740051782041600 |
| 9 | 259500083163955200 |
| 10 | 111422936937037824000 |
| 11 | 57504006817918746624000 |
| 12 | 35122852492484487413760000 |