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 | -23 |
| 2 | 207 |
| 3 | -782 |
| 4 | -276 |
| 5 | 12259 |
| 6 | -29578 |
| 7 | -42711 |
| 8 | 229057 |
| 9 | 93863 |
| 10 | -828023 |
| 11 | -2014110 |
| 12 | 4727719 |
| 13 | 15059963 |
| 14 | -22586736 |
| 15 | -58481962 |
| 16 | -8654877 |
| 17 | 246061935 |
| 18 | 463250567 |
| 19 | -671892192 |
| 20 | -1993509889 |
| 21 | -2171787581 |
| 22 | 5545061605 |
| 23 | 20642183588 |