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 | 7 |
| 2 | -401 |
| 3 | -9107 |
| 4 | 477601 |
| 5 | 19735807 |
| 6 | -936451601 |
| 7 | -59841840107 |
| 8 | 2530929662401 |
| 9 | 233147132022007 |
| 10 | -8618235208570001 |
| 11 | -1109489740559021507 |
| 12 | 34893836098508354401 |
| 13 | 6235501451708274618607 |
| 14 | -160480431014315950915601 |
| 15 | -40407022162862341753633307 |
| 16 | 800393754206596276404873601 |