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 | 1 |
| 2 | -1 |
| 3 | -7 |
| 4 | -145 |
| 5 | -6095 |
| 6 | -433025 |
| 7 | -46676375 |
| 8 | -7108596625 |
| 9 | -1454225641375 |
| 10 | -384836032842625 |
| 11 | -127950804666254375 |
| 12 | -52219402100109700625 |
| 13 | -25668587693366081579375 |
| 14 | -14959038795678519196890625 |
| 15 | -10198912212548907619042984375 |
| 16 | -8042754039731999959020139140625 |