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 | 1 |
| 2 | 64 |
| 3 | 900 |
| 4 | 5184 |
| 5 | 32400 |
| 6 | 57600 |
| 7 | 176400 |
| 8 | 705600 |
| 9 | 1166400 |
| 10 | 3240000 |
| 11 | 6350400 |
| 12 | 14288400 |
| 13 | 37454400 |
| 14 | 25401600 |
| 15 | 87609600 |