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 | -2 |
| 2 | 1 |
| 3 | 7 |
| 4 | -8 |
| 5 | -65 |
| 6 | 37 |
| 7 | 1024 |
| 8 | 1351 |
| 9 | -19001 |
| 10 | -92618 |
| 11 | 232513 |
| 12 | 4087189 |
| 13 | 9953926 |
| 14 | -123909155 |
| 15 | -1170342533 |
| 16 | -676144160 |
| 17 | 62840385619 |
| 18 | 490129709977 |
| 19 | -551829062288 |
| 20 | -40624407525941 |
| 21 | -305175084654341 |
| 22 | 698633855671510 |
| 23 | 34571970743398621 |
| 24 | 278738497423756153 |
| 25 | -663168571756087538 |