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 | -5 |
| 2 | 32 |
| 3 | -299 |
| 4 | 4015 |
| 5 | -74080 |
| 6 | 1801537 |
| 7 | -55855829 |
| 8 | 2150565968 |
| 9 | -100668835739 |
| 10 | 5630336915071 |
| 11 | -370807060847872 |
| 12 | 28403381397111649 |
| 13 | -2503741873703550533 |
| 14 | 251652633457563092096 |
| 15 | -28608467296650576313259 |
| 16 | 3652291148549164761101551 |
| 17 | -520296573821474451201241696 |