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 | 32 |
| 2 | 7776 |
| 3 | 82944 |
| 4 | 388800000 |
| 5 | 155520000 |
| 6 | 2613824640000 |
| 7 | 11948912640000 |
| 8 | 3629482214400000 |
| 9 | 806551603200000 |
| 10 | 77937565348177920000 |
| 11 | 14170466426941440000 |
| 12 | 92074412343521441433600000 |
| 13 | 524640526173911347200000 |
| 14 | 6070840374298117017600000 |
| 15 | 12951126131835982970880000 |