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 | 224 |
| 2 | 4032 |
| 3 | 50688 |
| 4 | 512512 |
| 5 | 4472832 |
| 6 | 35094528 |
| 7 | 254017536 |
| 8 | 1725825024 |
| 9 | 11142168576 |
| 10 | 68975329280 |
| 11 | 412216197120 |
| 12 | 2390853943296 |
| 13 | 13514114596864 |
| 14 | 74693776244736 |
| 15 | 404792077713408 |
| 16 | 2155824474488832 |
| 17 | 11304491362025472 |