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 | 2340 |
| 3 | 75600 |
| 4 | 2204496 |
| 5 | 60419520 |
| 6 | 1591202880 |
| 7 | 40800672000 |
| 8 | 1027086863616 |
| 9 | 25522067450880 |
| 10 | 628349082117120 |
| 11 | 15366613964083200 |
| 12 | 373968813041012736 |
| 13 | 9068526888588656640 |
| 14 | 219326169845571010560 |