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 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 32 |
| 5 | 60 |
| 6 | 384 |
| 7 | 840 |
| 8 | 6144 |
| 9 | 15120 |
| 10 | 122880 |
| 11 | 332640 |
| 12 | 2949120 |
| 13 | 8648640 |
| 14 | 82575360 |
| 15 | 259459200 |
| 16 | 2642411520 |
| 17 | 8821612800 |
| 18 | 95126814720 |
| 19 | 335221286400 |
| 20 | 3805072588800 |
| 21 | 14079294028800 |
| 22 | 167423193907200 |
| 23 | 647647525324800 |