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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 960 |
| 6 | 11136 |
| 7 | 98256 |
| 8 | 820896 |
| 9 | 6523248 |
| 10 | 49672560 |
| 11 | 367817184 |
| 12 | 2663082864 |
| 13 | 18939278736 |
| 14 | 132735870240 |
| 15 | 918669297696 |