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 | 4800 |
| 2 | 142800 |
| 3 | 1909440 |
| 4 | 32948784 |
| 5 | 210313800 |
| 6 | 993938400 |
| 7 | 1069286400 |
| 8 | 1264808160 |
| 9 | 1309463064 |
| 10 | 2281635216 |
| 11 | 3055104000 |
| 12 | 3250790400 |