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 | -26 |
| 2 | 1926 |
| 3 | -179780 |
| 4 | 18601030 |
| 5 | -2040558156 |
| 6 | 232474675356 |
| 7 | -27194647204296 |
| 8 | 3243950895157830 |
| 9 | -392816395353590780 |
| 10 | 48137032861960009396 |
| 11 | -5956254538539775751736 |
| 12 | 742934976698338610043676 |
| 13 | -93295798612937748051169400 |
| 14 | 11783597764983598765508801400 |