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 | -41 |
| 2 | -11128 |
| 3 | -3785793 |
| 4 | -1476507895 |
| 5 | -618962022329 |
| 6 | -271503819749095 |
| 7 | -122857395553223337 |
| 8 | -56870247894888518054 |
| 9 | -26784343611333662213130 |
| 10 | -12787694574831980406719382 |
| 11 | -6172809198874485994313412898 |