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 | 0 |
| 2 | -1 |
| 3 | 4 |
| 4 | -44 |
| 5 | -946 |
| 6 | -8281 |
| 7 | -592100 |
| 8 | -25369920 |
| 9 | -511563816 |
| 10 | -55400732937 |