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 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 96 |
| 4 | 1536 |
| 5 | 30720 |
| 6 | 737280 |
| 7 | 20643840 |
| 8 | 660602880 |
| 9 | 23781703680 |
| 10 | 951268147200 |
| 11 | 41855798476800 |
| 12 | 2009078326886400 |
| 13 | 104472072998092800 |
| 14 | 5850436087893196800 |
| 15 | 351026165273591808000 |
| 16 | 22465674577509875712000 |