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 | -3 |
| 2 | -36 |
| 3 | -612 |
| 4 | -11934 |
| 5 | -250614 |
| 6 | -5513508 |
| 7 | -125235396 |
| 8 | -2911722957 |
| 9 | -68910776649 |
| 10 | -1653858639576 |
| 11 | -40143659706072 |
| 12 | -983519662798764 |
| 13 | -24285370135261788 |
| 14 | -603664914790793016 |
| 15 | -15091622869769825400 |
| 16 | -379177024602966863175 |
| 17 | -9568643738510163782475 |