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 | -7 |
| 2 | 9 |
| 3 | 60 |
| 4 | -265 |
| 5 | 429 |
| 6 | -189 |
| 7 | -812 |
| 8 | 2925 |
| 9 | -5732 |
| 10 | 6980 |
| 11 | -4824 |
| 12 | -198 |
| 13 | 10010 |
| 14 | -32298 |
| 15 | 69768 |
| 16 | -104651 |
| 17 | 107373 |
| 18 | -72435 |
| 19 | 26422 |
| 20 | 19656 |
| 21 | -115011 |
| 22 | 361763 |
| 23 | -834900 |
| 24 | 1427679 |
| 25 | -1797817 |
| 26 | 1641447 |
| 27 | -1057446 |
| 28 | 454155 |
| 29 | -69564 |
| 30 | -298980 |
| 31 | 1307448 |
| 32 | -4102104 |
| 33 | 9924525 |
| 34 | -18599295 |