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) |
|---|---|
| 2 | -11 |
| 3 | 863 |
| 4 | -215641 |
| 5 | 41208059 |
| 6 | -9038561117 |
| 7 | 28141689013943 |
| 8 | -2360298440602051 |
| 9 | 3420015713873670001 |
| 10 | -147239749512798268300237 |
| 11 | 176556159649301309969405807 |
| 12 | -178564975300377173768513546347 |