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 | -231 |
| 2 | 6608 |
| 3 | -176330 |
| 4 | 4714710 |
| 5 | -130014885 |
| 6 | 3745101360 |
| 7 | -113311778580 |
| 8 | 3608430175350 |
| 9 | -120977128347075 |
| 10 | 4267052705916000 |
| 11 | -158151857368254750 |
| 12 | 6150573832264611750 |
| 13 | -250598489767931930625 |
| 14 | 10680148143520635780000 |
| 15 | -475373543975596731465000 |