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 | 1 |
| 2 | 108 |
| 3 | 108 |
| 4 | 1140 |
| 5 | 288 |
| 6 | 35280 |
| 7 | 1068480 |
| 8 | 88361280 |
| 9 | 4409475840 |
| 10 | 2094434496000 |
| 11 | 868006971127296000 |