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 | 1 |
| 1 | -264 |
| 2 | -135432 |
| 3 | -5196576 |
| 4 | -69341448 |
| 5 | -515625264 |
| 6 | -2665843488 |
| 7 | -10653352512 |
| 8 | -35502821640 |
| 9 | -102284205672 |
| 10 | -264515760432 |
| 11 | -622498190688 |
| 12 | -1364917062432 |
| 13 | -2799587834736 |
| 14 | -5465169838656 |
| 15 | -10149567696576 |
| 16 | -18177444679944 |