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 | 2 |
| 2 | -158 |
| 3 | -964 |
| 4 | 74860 |
| 5 | 774392 |
| 6 | -59087816 |
| 7 | -870884656 |
| 8 | 65263814032 |
| 9 | 1259194142240 |
| 10 | -92636252574176 |
| 11 | -2225167015577152 |
| 12 | 160627468056027328 |
| 13 | 4646979614394038144 |
| 14 | -328987488497205476480 |
| 15 | -11197324742440089463552 |
| 16 | 777044947563329128919296 |