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 | 12 |
| 2 | 144 |
| 3 | 8640 |
| 4 | 103680 |
| 5 | 1741824 |
| 6 | 104509440 |
| 7 | 179159040 |
| 8 | 2149908480 |
| 9 | 1418939596800 |
| 10 | 23838185226240 |
| 11 | 338068808663040 |
| 12 | 20284128519782400 |
| 13 | 18723810941337600 |
| 14 | 32097961613721600 |
| 15 | 229179445921972224000 |