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 | 1 |
| 1 | 12 |
| 2 | 1440 |
| 3 | 51840 |
| 4 | 87091200 |
| 5 | 1045094400 |
| 6 | 376233984000 |
| 7 | 902961561600 |
| 8 | 166867296583680000 |
| 9 | 18021668031037440000 |
| 10 | 140569010642092032000000 |
| 11 | 1686828127705104384000000 |
| 12 | 8501613763633726095360000000 |
| 13 | 102019365163604713144320000000 |
| 14 | 208119504933753614814412800000000 |