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 | 168 |
| 3 | 11232 |
| 4 | 161280 |
| 5 | 1488000 |
| 6 | 7170552 |
| 7 | 33784128 |
| 8 | 106659840 |
| 9 | 327525120 |
| 10 | 839997000 |
| 11 | 2124276000 |
| 12 | 4307378688 |
| 13 | 9726417792 |
| 14 | 18401146008 |
| 15 | 34512588000 |