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 | 1 |
| 2 | 1323 |
| 3 | 5768 |
| 4 | 18900 |
| 5 | 3024 |
| 6 | 37800 |
| 7 | 25920 |
| 8 | 0 |
| 9 | 40320 |
| 10 | 9072 |
| 11 | 0 |
| 12 | 15120 |
| 13 | 0 |
| 14 | 0 |
| 15 | 24192 |