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 | 2 |
| 2 | 12 |
| 3 | 720 |
| 4 | 864 |
| 5 | 4320 |
| 6 | 21600 |
| 7 | 62208 |
| 8 | 151200 |
| 9 | 311040 |
| 10 | 1555200 |
| 11 | 7776000 |
| 12 | 10886400 |
| 13 | 54432000 |
| 14 | 381024000 |
| 15 | 4191264000 |
| 16 | 160030080000 |
| 17 | 251475840000 |
| 18 | 1760330880000 |
| 19 | 11522165760000 |
| 20 | 19363639680000 |
| 21 | 126743823360000 |
| 22 | 251727315840000 |
| 23 | 403275801600000 |
| 24 | 829595934720000 |