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 | -9 |
| 2 | -112 |
| 3 | 6777 |
| 4 | 71792 |
| 5 | -3697929 |
| 6 | -115338832 |
| 7 | 33365774889 |
| 8 | 346152459632 |
| 9 | -32197909552119 |
| 10 | -1669781464441552 |
| 11 | 379679538201687387 |
| 12 | 11813777423859564272 |
| 13 | -1587336251116141480509 |
| 14 | -115243388514684566005072 |
| 15 | 142933582086486567666092793 |
| 16 | 1482460665337857454238617712 |