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 | 0 |
| 2 | -3 |
| 3 | -30 |
| 4 | -483 |
| 5 | -12660 |
| 6 | -492063 |
| 7 | -26407290 |
| 8 | -1854592743 |
| 9 | -162954226920 |
| 10 | -17150991170523 |
| 11 | -2051454240374550 |
| 12 | -254425037609483403 |
| 13 | -24186909676571913180 |
| 14 | 3098088521295623020617 |