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 | 8 |
| 2 | 104 |
| 3 | 592 |
| 4 | 8736 |
| 5 | 38912 |
| 6 | 473600 |
| 7 | 2466048 |
| 8 | 38054016 |
| 9 | 155493536 |
| 10 | 2015330304 |
| 11 | 10359014400 |
| 12 | 166290432000 |
| 13 | 636328345600 |
| 14 | 7645340651520 |
| 15 | 42424026529792 |
| 16 | 648494317126656 |
| 17 | 2599936977797120 |
| 18 | 32817383473149440 |
| 19 | 164708609085669376 |
| 20 | 3010983668199456768 |