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 | -3 |
| 3 | 27 |
| 4 | -441 |
| 5 | 11529 |
| 6 | -442827 |
| 7 | 23444883 |
| 8 | -1636819569 |
| 9 | 145703137041 |
| 10 | -16106380394643 |
| 11 | 2164638920874507 |
| 12 | -347592265948756521 |
| 13 | 65724760945840254489 |
| 14 | -14454276753061349098587 |