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 | 12 |
| 2 | 168 |
| 3 | 4224 |
| 4 | 206848 |
| 5 | 20316160 |
| 6 | 4053794816 |
| 7 | 1651951796224 |
| 8 | 1376451119022080 |
| 9 | 2342575493674434560 |
| 10 | 8125862822063095414784 |
| 11 | 57307393009149041432330240 |