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 | 1 |
| 2 | 6 |
| 3 | 72 |
| 4 | 120 |
| 5 | 3528 |
| 6 | 840 |
| 7 | 3600 |
| 8 | 2520 |
| 9 | 28800 |
| 10 | 10080 |
| 11 | 129600 |
| 12 | 36960 |
| 13 | 259200 |
| 14 | 50400 |
| 15 | 176400 |
| 16 | 83160 |
| 17 | 352800 |
| 18 | 138600 |