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 | -8 |
| 2 | 80 |
| 3 | -656 |
| 4 | 6416 |
| 5 | -53648 |
| 6 | 515600 |
| 7 | -4378256 |
| 8 | 41501456 |
| 9 | -356735888 |
| 10 | 3344840720 |
| 11 | -29029824656 |
| 12 | 269858356496 |
| 13 | -2360005731728 |
| 14 | 21789807399440 |
| 15 | -191710220083856 |
| 16 | 1760576352843536 |
| 17 | -15563712198881168 |