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 | -1006 |
| 3 | -113620 |
| 4 | 2122156 |
| 5 | 819611416 |
| 6 | 3462564856 |
| 7 | -8181491724016 |
| 8 | -253487023438960 |
| 9 | 103499490028946336 |
| 10 | 6528273301571581216 |
| 11 | -1571126316446016259904 |
| 12 | -161635396853273818415936 |
| 13 | 27509093252961272911088000 |
| 14 | 4249556012170678409171144576 |