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 | 2 |
| 2 | 12 |
| 3 | 48 |
| 4 | 2016 |
| 5 | 221760 |
| 6 | 6918912 |
| 7 | 1881944064 |
| 8 | 3079544832 |
| 9 | 1558249684992 |
| 10 | 1265298744213504 |
| 11 | 7591792465281024 |
| 12 | 919297051250393088 |
| 13 | 36771882050015723520 |
| 14 | 13282003796465679335424 |