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) |
|---|---|
| 1 | -24 |
| 2 | -1472 |
| 3 | -6048 |
| 4 | 84480 |
| 5 | -115920 |
| 6 | -370944 |
| 7 | 401856 |
| 8 | 987136 |
| 9 | 2727432 |
| 10 | -7109760 |
| 11 | -12830688 |
| 12 | 21288960 |
| 13 | 13865712 |
| 14 | 24647168 |
| 15 | -29211840 |
| 16 | -196706304 |
| 17 | 165742416 |
| 18 | 167282496 |
| 19 | -255874080 |
| 20 | 408038400 |
| 21 | 101267712 |
| 22 | -786948864 |
| 23 | -447438528 |
| 24 | 248758272 |
| 25 | 611981400 |
| 26 | 850430336 |
| 27 | 1758697920 |