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 | 180 |
| 2 | 5040 |
| 3 | 143640 |
| 4 | 4199580 |
| 5 | 125621496 |
| 6 | 3830266440 |
| 7 | 118655943120 |
| 8 | 3724872182460 |
| 9 | 118248726796200 |
| 10 | 3789926661961440 |
| 11 | 122473276342326000 |
| 12 | 3986235855826497000 |
| 13 | 130561182081992667600 |
| 14 | 4300094066688571550400 |