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 | 1 |
| 2 | -97 |
| 3 | -293 |
| 4 | 28225 |
| 5 | 143081 |
| 6 | -13687169 |
| 7 | -97818797 |
| 8 | 9291579137 |
| 9 | 85981515985 |
| 10 | -8109191282849 |
| 11 | -92371076948149 |
| 12 | 8649337125963073 |
| 13 | 117277723616986297 |
| 14 | -10901977774859968705 |
| 15 | -171807014577365168189 |
| 16 | 15854100314466788828161 |
| 17 | 285247499171775372548513 |