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 | 28 |
| 2 | 62 |
| 3 | -38696 |
| 4 | -1217780 |
| 5 | 77656208 |
| 6 | 6570559624 |
| 7 | -152431023584 |
| 8 | -37475677000048 |
| 9 | -168877363780160 |
| 10 | 238788382960467424 |
| 11 | 7905369289385843072 |
| 12 | -1675106997369228675392 |
| 13 | -115395115449577347286784 |
| 14 | 12491491044719414623199360 |
| 15 | 1516175576216471435824394752 |