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 | -1 |
| 3 | -11 |
| 4 | 1 |
| 5 | -299 |
| 6 | 36 |
| 7 | -1 |
| 8 | -15371 |
| 9 | 2063 |
| 10 | -85 |
| 11 | 1 |
| 12 | -1285371 |
| 13 | 182474 |
| 14 | -8948 |
| 15 | 166 |
| 16 | -1 |
| 17 | -159158691 |
| 18 | 23364725 |
| 19 | -1265182 |
| 20 | 29034 |
| 21 | -287 |
| 22 | 1 |
| 23 | -27376820379 |
| 24 | 4107797216 |
| 25 | -237180483 |
| 26 | 6171928 |
| 27 | -77537 |
| 28 | 456 |
| 29 | -1 |