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 | 362880 |
| 1 | 362880 |
| 2 | 362880 |
| 3 | 122472 |
| 4 | 40824 |
| 5 | 13590 |
| 6 | 4526 |
| 7 | 1490 |
| 8 | 520 |
| 9 | 172 |
| 10 | 58 |
| 11 | 22 |
| 12 | 6 |
| 13 | 2 |
| 14 | 0 |