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 | -48 |
| 2 | 756 |
| 3 | -5888 |
| 4 | 24150 |
| 5 | -36288 |
| 6 | -117208 |
| 7 | 675840 |
| 8 | -1022787 |
| 9 | -1159200 |
| 10 | 5880732 |
| 11 | -4451328 |
| 12 | -7510594 |
| 13 | 5625984 |
| 14 | 18257400 |
| 15 | 15794176 |
| 16 | -117400878 |
| 17 | 49093776 |
| 18 | 202566980 |
| 19 | -142195200 |
| 20 | -88609248 |
| 21 | -282275136 |
| 22 | 428795256 |
| 23 | 510935040 |
| 24 | -637480625 |
| 25 | 360508512 |
| 26 | -1978535160 |