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 | 6 |
| 1 | 48 |
| 2 | 1440 |
| 3 | 103680 |
| 4 | 14515200 |
| 5 | 3483648000 |
| 6 | 1316818944000 |
| 7 | 737418608640000 |
| 8 | 584035538042880000 |
| 9 | 630758381086310400000 |
| 10 | 901984484953423872000000 |
| 11 | 1666867328193927315456000000 |
| 12 | 3900469547973789918167040000000 |