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 | 2 |
| 1 | 20 |
| 2 | 8 |
| 3 | 360 |
| 4 | 288 |
| 5 | 48 |
| 6 | 9840 |
| 7 | 11360 |
| 8 | 3520 |
| 9 | 320 |
| 10 | 363360 |
| 11 | 522752 |
| 12 | 225344 |
| 13 | 37888 |
| 14 | 2176 |
| 15 | 16776000 |
| 16 | 27849600 |
| 17 | 14871296 |
| 18 | 3491072 |
| 19 | 373504 |
| 20 | 14848 |
| 21 | 922158720 |
| 22 | 1692808704 |
| 23 | 1053556480 |
| 24 | 308703232 |
| 25 | 46459904 |
| 26 | 3467264 |
| 27 | 101376 |
| 28 | 58499239680 |
| 29 | 115821927936 |