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) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 3 |
| 4 | -8 |
| 5 | 22 |
| 6 | -53 |
| 7 | 158 |
| 8 | -481 |
| 9 | 1471 |
| 10 | -4621 |
| 11 | 14612 |