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 | 11 |
| 2 | -329 |
| 3 | -13519 |
| 4 | 295441 |
| 5 | 27584051 |
| 6 | -361317689 |
| 7 | -78451432279 |
| 8 | 275184965281 |
| 9 | 285452190822491 |
| 10 | 2025474989659351 |
| 11 | -1262254633814956639 |
| 12 | -23910902170778310479 |
| 13 | 6553155098722204435331 |
| 14 | 211963483784997365090791 |
| 15 | -38953278800314916926586599 |
| 16 | -1859239582352196300555291839 |