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 | 6 |
| 2 | 120 |
| 3 | 840 |
| 4 | 362880 |
| 5 | 14968800 |
| 6 | 9340531200 |
| 7 | 49037788800 |
| 8 | 3201186852864000 |
| 9 | 8485288812000 |
| 10 | 182467650613248000 |
| 11 | 908859963476424960000 |
| 12 | 1424498881530396672000000 |
| 13 | 10633661572674172032000000 |
| 14 | 8289151869130970582384640000000 |
| 15 | 1720739115690134518218240000000 |
| 16 | 97858575719142221963014963200000000 |