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 | 60 |
| 2 | 2310 |
| 3 | 73920 |
| 4 | 2162160 |
| 5 | 60540480 |
| 6 | 1664863200 |
| 7 | 45664819200 |
| 8 | 1261490630400 |
| 9 | 35321737651200 |
| 10 | 1006669523059200 |
| 11 | 29284931579904000 |
| 12 | 871226714502144000 |
| 13 | 26538906072526848000 |
| 14 | 828392996692445184000 |