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 | -192 |
| 2 | -4608 |
| 3 | -9494784 |
| 4 | -1988603904 |
| 5 | -1136127187584 |
| 6 | -419383041398784 |
| 7 | -200225564597488128 |
| 8 | -88040635024586342400 |
| 9 | -41470393697874515307456 |
| 10 | -19381646100387803980004352 |
| 11 | -9267227811160245194038205184 |