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 | -119 |
| 3 | 2035 |
| 4 | 82705 |
| 5 | -2415125 |
| 6 | -144599399 |
| 7 | 5930847715 |
| 8 | 472496522785 |
| 9 | -24926507404325 |
| 10 | -2481730783765079 |
| 11 | 160024612101360595 |
| 12 | 19118345091815106865 |
| 13 | -1456918380045434844725 |
| 14 | -203069316072098631813959 |
| 15 | 17855720431999071247540675 |
| 16 | 2844318807040517472572410945 |