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 | -21 |
| 2 | 168 |
| 3 | -511 |
| 4 | -756 |
| 5 | 8946 |
| 6 | -13265 |
| 7 | -41604 |
| 8 | 100023 |
| 9 | 168819 |
| 10 | -192675 |
| 11 | -1687035 |
| 12 | 551446 |
| 13 | 9388890 |
| 14 | 39015 |
| 15 | -23757153 |
| 16 | -51335655 |
| 17 | 33287667 |
| 18 | 289673223 |
| 19 | 168014469 |
| 20 | -413315910 |
| 21 | -2158209675 |
| 22 | -1508351355 |
| 23 | 6477445065 |