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 | 14 |
| 2 | -382 |
| 3 | -21532 |
| 4 | 360940 |
| 5 | 54835144 |
| 6 | -275424584 |
| 7 | -194024223568 |
| 8 | -1601971263088 |
| 9 | 874740412095200 |
| 10 | 20579820279916576 |
| 11 | -4767882097991423936 |
| 12 | -197596846711589525312 |
| 13 | 30303674377706263065728 |
| 14 | 1908994147478771376114560 |
| 15 | -218491414999696281462267136 |