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 | 12 |
| 3 | 12 |
| 4 | 576 |
| 5 | 66240 |
| 6 | 15321600 |
| 7 | 5411750400 |
| 8 | 2834466324480 |
| 9 | 2102110586634240 |
| 10 | 2130686007341875200 |
| 11 | 2866934087721639936000 |
| 12 | 4998512704699099643904000 |
| 13 | 11064050379110706817558118400 |
| 14 | 30552674703715743883429360435200 |