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 | 2 |
| 2 | 0 |
| 3 | -8 |
| 4 | 48 |
| 5 | 1024 |
| 6 | -29376 |
| 7 | -2008960 |
| 8 | 249483264 |
| 9 | 64889376256 |
| 10 | -32966832018432 |
| 11 | -33890678261809152 |
| 12 | 69272943033878630400 |
| 13 | 284019472607289480388608 |
| 14 | -2325552273529676473281282048 |
| 15 | -38111154065733485540332985155584 |
| 16 | 1248673879720871231428642700812025856 |