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 | -5 |
| 3 | 295 |
| 4 | 1195 |
| 5 | -68705 |
| 6 | -604205 |
| 7 | 33497095 |
| 8 | 521891995 |
| 9 | -27561957905 |
| 10 | -685542701405 |
| 11 | 33989796735895 |
| 12 | 1270896506674795 |
| 13 | -58096477696175105 |
| 14 | -3155667333487086605 |
| 15 | 129898710835267046695 |