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 | -132 |
| 3 | 793 |
| 4 | 87252 |
| 5 | -436921 |
| 6 | -140768892 |
| 7 | 3947647721 |
| 8 | 422687372052 |
| 9 | -3810109655911 |
| 10 | -2039091735266652 |
| 11 | 44929891907903803 |
| 12 | 14426758204028393652 |
| 13 | -187839991797725112301 |
| 14 | -140733116432941105153212 |
| 15 | 16914279751678940247668857 |
| 16 | 1810353973870094177898260052 |